Unit 4 Eat Well 核心知识点精讲精练 2(Grammar)-2024-2025学年七年级英语下册教材核心知识全解（人教版2024）

Unit 4 Eat Well 核心知识点精讲精练 2 (Grammar) 【主要内容】 · 【单元核心知识点精讲精练】每个单元按照教材安排分为Section A；Grammar和Section B三个部分。 · Grammar 精讲本单元的重点语法，讲解部分配有随学随练。 · 本资料设置了单元语法基础练习和单元语法提升练习，丰富多样的习题帮助学生更好地学习掌握并英语语法知识。 1、 单元重点语法解析 选择疑问句 1. 选择疑问句概述 (1) 选择疑问句是提供两种或两种以上的情况，问对方选择哪一种的问句。 (2) 提供的两种或两种以上的选项，在最后两个选项之间用连词or连接。 Which soup would you like, fish or chicken? 您想要什么汤，鱼汤还是鸡汤？ Would you like an apple, a pair of a banana? 你想要一个苹果，梨子还是香蕉？ (3) 朗读时 or 前用升调，or 后面用降调，句末用问号。 2. 选择疑问句的句型结构 (1) 一般疑问句 + or + 另一个备选对象? Would you like some tea or coffee?你要茶水还是咖啡? (2) 特殊疑问句+ or + 另一个备选对象? What kind of sport do you like, football or swimming? 你喜欢什么运动，足球还是游泳？ 3. 选择疑问句的回答 (1) 选择疑问句不用Yes / No 回答，一般在所提供的选项范围内选择回答，有时需要时具体情况灵活回答。 (2) 回答时一般用一个完整的陈述句，也可以是简略形式，省略主语和谓语。 —What size do you need, 37 or 38 ? 你要什么尺寸，37码还是38码？ —38. 38码。 —Which do you like best, coffee, water or juice? 你最喜欢哪一种，咖啡、水还是果汁？ —None. I only like tea. 都不喜欢。我只喜欢茶。 [随学随用] 单项填空。 (1) —Can you play the piano or the violin? —________. A．Yes, I can B．No, I can’t C．I can play the piano D．I don’t know (2) —Peter, ________ you play football ________ basketball? —I can play basketball. A．do; or B．can; or C．do; and D．can; and (3) —Is your uncle a policeman or a doctor? —________. He works in a hospital. A．Yes, he is B．No, he isn’t C．He is a policeman D．He is a doctor (4) —Would you like some beef or some mutton? — ________. A．Yes, I would B．Yes, please C．Yes, some beef D．Some beef, please (5) —Would you like some tea ________ coffee? —Either is OK. A．or B．and C．but D．so 按要求完成句子。 (1) 你想要哪个，米饭还是饺子？ you like, rice dumplings? (2) They’d like to order Beijing roast duck.  (用hot pot连接改为选择疑问句) they like to order Beijing roast duck hot pot? (3) My birthday is on May 4th.（用June 2nd改为选择疑问句） your birthday on May 4th on June 2nd? (4) Is your home near your school? Is your home far away from your school? （将两个句子合并为一句） ? (5) look, colours, you, better, or, do, cool, colours, warm, in(连词成句) ? (6) go to school, you, or, by bike, do, by bus (?) ? 可数名词与不可数名词 1. 可数名词 (1) 可数名词是表示可以计数的单个物体、人、想法等的名词。可数名词前可以直接加a/an或数词。 如：an orange 一个橙子；six oranges 六个橙子 a school 一个学校； some schools 一些学校 (2) 可数名词有单数和复数两种形式。可数名词单数变复数规则如下： 规则 变化 · 一般情况直接在词尾加-s。如：pencil→pencils; animal→animals · 以s,x,sh,ch结尾的名词，在词尾加-es。如：box→boxes; class→classes · 以辅音字母+y结尾的名词，将y改为i，再加-es。如：city→cities; baby→babies · 注意：toy, monkey等以元音字母+y结尾，变复数时直接在词尾加-s。 · 以-f或-fe结尾的名词，将-f或-fe改为v，再加-es。如：leaf→leaves叶子; knife→knives刀 (注意：giraffe复数为giraffes) · 以-o结尾的名词，一般生物加-es，非生物加-s。如：tomato→tomatoes；photo→photos 不规则 变化 · 单复数同形(单数和复数形式一样) 以下可数名词，单复数同形：Chinese; Japanese; deer(鹿); fish(鱼); sheep · 改变元音字母 a-e 类：man→men; woman→women oo→ee类：foot→feet; tooth→teeth(牙齿); goose→geese 其他：mouse→mice(老鼠) · 改变辅音字母 child→children; ox→oxen(公牛) (3) 复合名词 由两个名词共同构成的名词是复合名词 · 在变复数时，一般把后面的名词变为复数，前面的名词用单数。 · 如果前面的名词是man，woman，变复数时，man，woman也要变成复数形式。 如：an apple tree一棵苹果树；three apple trees 三棵苹果树 a man teacher 一名男教师；four men teachers 四名男教师 2. 不可数名词 (1) 不可数名词是表示通常不能看成单个个体的材料、液体、气体等的物体的名词。不可数名词一般不与a/an连用，前面也不直接加数字。大部分不可数名词都是单数，没有复数形式。 (2) 不可数名词量的表达：表达不可数名词的数量，通常用“冠词/数词+计量词+of+不可数名词”的结构。 如：a piece of cake 一块蛋糕；two pieces of cake 两块蛋糕 a cup of tea一杯茶；two cups of tea两杯茶 two kilos of chicken 两千克鸡肉 (3) 常见不可数名词： water水；juice果汁；tea茶；milk牛奶 rice米饭；bread面包；meat 肉；beef牛肉；mutton羊肉；pork猪肉 hair头发；paper纸；money钱 time时间；fun乐趣；work工作，love爱 3. 既可作可数名词也可作不可数名词的词 · 集体名词team, class, family等表示整体时用作单数，表示集体中的成员时，用作复数。 My family like watching TV. 我们一家人喜欢看电视。(指家庭成员，用作复数) His family is big. 他的家庭很大。(指家庭，看作整体，用作单数) · fish, chicken等既可以表示动物，也可以表示肉类；表示动物是可数名词，表示肉类是不可数名词。 I bought three fish. 我买了三条鱼。(指鱼，动物) I like eating fish. 我喜欢吃鱼。(指鱼肉，肉类) · food, fruit 表示泛指的食物或水果时是不可数名词，表示种类时是可数名词。 The fruit is nice. 这水果很不错。 He sells fruits. 他卖各种水果。 · glass表示“玻璃”，是材料名词，不可数；表示“玻璃杯”，是可数名词；表示“眼镜”时，总是用复数形式glasses。 · cabbage等蔬菜，水果名词被视为植物时，通常指整个水果或整棵蔬菜，是可数名词。表示“吃的食物”时(吃的食物会被分割)用作不可数名词。 · salad；ice cream；cake表示整体时，指“一份沙拉”，“一客冰淇淋”，“一个蛋糕”是可数名词；表示食物时(食用时被分割开了)，是不可数名词。 注意：cake表示“饼状物，饼”是可数名词。 · sweet表示“糖果”是可数名词；表示“甜点”，泛指食物是不可数名词，指某个具体的甜点是可数名词。 · drink在表示饮料的一种、一杯、一份、一口等时为可数名词；在泛指一般意义的“饮料”为不可数 名词。 · coffee和tea泛指“咖啡”或“茶”是不可数名词；表示“一杯咖啡”或“一杯茶”是可数名词。 [随学随练] 单项填空。 (1) —I’d like two ______ and two kilos of ______. —OK. Here you are. A．tomato; chickens B．potatoes; chickens C．potato; chicken D．tomatoes; chicken (2) —What can you see on the farm? —I can see some ________ and ________. A．sheep; plant B．sheeps; plant C．sheep; plants D．sheeps; plants (3) I live a healthy life. I often have ________ and ________ for lunch. A．fish; eggs B．fishes; egg C．chickens; carrots D．chicken; carrot (4) —Would you like some ________? —Yes, please. I like them very much. A．pear B．watermelons C．lemon D．strawberry (5) Nowadays, we can see more and more ________ on the buses. A．woman drivers B．woman’s drivers C．women’s driver D．women drivers (6) —Good morning, Madam. Can I help you?   —Sure, I’d like ________ for cooking vegetables. A．two cups of tea B．three pieces of bread C．five kilos of oil D．four bottles of milk (7) There _______ some orange juice and many _______ on the table. A．are; oranges B．is; oranges C．is; orange D．are; orange (8) —Mike’s family lives a healthy life. He with his parents often ________. —That’s true! They think walking is ________. A．takes exercise; good exercises B．do exercise; good exercises C．does exercise; good exercise D．take exercise; good exercise (9) I always have rice with ________ and a banana ________ lunch. A．fishes; for B．fishes; on C．fish; for D．fish; on (10) —Can I help you? —Yes. ________, please. A．Two cup of teas B．Two cups of teas C．Two cups of tea D．Two cup of tea (11) There are some ________and ________ on the table. A．potatoes; tea B．chicken; sweets C．tomatos; porks D．tomatos; milk (12) —How many ________ are there on the table? —Eighteen. A．milk B．milks C．bottle of milk D．bottles of milk 2、 单元语法基础练习 单项填空 (1) —Is your favorite color a warm color or a cool color? —__________ A．A cool color. B．Yes, a warm color. C．No, I like cool color better. D．A hotter color. (2) —Do you like Maths or English? —________. It’s great fun to learn another language. A．Yes, I do B．No, I don’t C．English D．Maths (3) —Do you like swimming or running, Alice?    —___________ A．Yes, I do B．No, I don’t. C．I like both. D．No, I do. (4) —Do ______ like going to ______? —I don’t know, maybe everyone likes something new, right? A．woman teachers; clothes shops B．women teachers; clothes shops C．woman teachers; sport shops D．women teachers; vegetables shops (5) For lunch, we have some ________ and ________. A．rices; vegetable B．rices; vegetables C．rice; vegetable D．rice; vegetables (6) —Do you do eye ________ every day at school? —Yes. And we also do morning ________ to build up our body. A．exercise; exercise B．exercises; exercise C．exercise: exercises D．exercises; exercises (7) This ______ and this pair of ______ are made of ______. A．glass, glasses, glasses B．glasses, glass, glass C．glasses, glasses, glass D．glass, glasses, glass (8) —May I have ________? — Sure. Here you are. A．any coffee B．some coffee C．any coffees D．some coffees (9) Today the pandas still don’t have ________ to eat. A．enough food B．food enough C．enough foods D．foods enough (10) For lunch, we have rice, fruit and ________ here and we can make ________ salad. A．vegetables; vegetables B．vegetable; vegetable C．vegetables; vegetable D．vegetable; vegetables (11) How much _________ do you want? A．tomatoes B．bananas C．hamburgers D．chicken (12) —What else do we need to make the dumplings, Mom? —We need ________. A．two spoon salt B．two spoons of salts C．two spoons of salt D．two spoon of salt (13) —I see ________ on the table. Are they for us, Dad? —Yes. One is for you and the other is for your brother. A．two bowl of dumpling B．two bowls of dumpling C．two bowl of dumplings D．two bowls of dumplings (14) —What can I do for you, Madam? —I would like some ________ and ________. A．sandwich; sugar B．sandwiches; sugars C．sandwiches; sugar D．sandwich; sugars (15) —________ pork would you like? —One and a half ________. A．How many; kilo B．How many; kilos C．How much; kilos D．How much; kilo (16) Look! Some ________ is in the bag and some ________ are in the basket A．bread; chicken B．vegetable; bread C．bananas; apples D．bread; strawberries 根据所给的图片及首字母提示，用合适的单词填空补全对话 Tom: What would you like to drink? Tea, coffee, or milk? Sarah: I’d just like a cup of t 1 , please. Tom: What would you like to eat? Sarah: Just a moment. I’ll look through the menu first. Tom: How about d 2 with beef and o 3 ? Sarah: I don’t like their flavour. Please give me some p 4 . Also, I’d like a vegetable s 5 . Tom: Would you like some soup? Sarah: Do you have m 6 soup? I like mutton. If you do, I’ll have a serving, please. Tom: Of course. 3、 单元语法提升练习 1. 根据首字母提示补全单词或用所给词的适当形式填空。 Hi, I’m Sally. I w 1 like to have juice and 2 (bread) in the morning. I don’t like 3 (egg), although (虽然) I know they are good for me. M 4 one day I’ll try to eat them with milk. Oh, I like hot p 5 very much. I always have 6 (cabbage), mushrooms and 7 (potato) in it. I also like t 8 and noodles, but I don’t like eggplants in it. My brother is different from me. He likes meat. He likes chicken and fish. He doesn’t like rice or 9 (dumpling). It’s not r 10 . He should have more main food. 2. 补全对话 (1) 根据对话内容，从选项中选出能填入空白处的最佳选项，其中有两个为多余选项。 A: Mum, I’d like to help cook dinner. B: Really? A: 1 B: All right. A: 2 B: Emm… Let me see. Boil some water and then stir two eggs. A: That’s easy. B: OK. Now give me some meat and potatoes. A: 3 B: Three. And bring four peppers. A: 4 B: Now wash them, and then cut the potatoes and peppers up. At last, slice the meat. A: They are a little difficult for me. I guess cooking is not easy. B: 5 A: I’m happy that I can help you. A．OK. Here you are. B．OK. Now how can I help? C．Do you want some yogurt? D．But you do these things well. E．You need to buy some tomatoes. F．How many potatoes do you need? G．I’d like to do something special for you on your birthday. (2) 根据对话内容，从下面选项中选出适当的选项补全对话。其中有两项为多余选项。 A: Hi, Jim. It’s time for lunch. B: Hi, Betty. 1 A: Yes, I’d love to. 2 B: Noodles. Is that OK with you? A: Yes. 3 B: Great! How about going to Noodle House? A: Sounds good. 4 B: Yes. How do we get there? A: 5 It’s not far away from our school. B: OK Let’s go. A．Let’s walk there. B．I love noodles, too. C．It’s about 35 minutes by bus. D．What’s the best restaurant in our city? E．Would you like to have lunch with me? F．What do you want to have, rice or noodles? G．I think it’s the best place to have noodles in our city. 3. 完形填空 How often do you get chocolate and chips? Five 1 a week? That’s a bad 2 habit. Every day we eat 3 food. Some are good for our health and some are bad 4 our health. What’s good food? Here 5 a food pyramid (金字塔). Every day we should eat bread and rice, we should 6 some vegetables and fruit, maybe two apples or three oranges. A lot of bread, rice, vegetables and fruit help us keep in good 7 . We should have one glass or two glasses of milk and less fish, meat, chicken or eggs. Of course, we should 8 ever eat junk food. Although sweets (甜食) and cola are very delicious, 9 we can’t often eat them. They’re 10 food. 1．A．time B．a time C．times D．/ 2．A．eat B．to eat C．eats D．eating 3．A．lots of B．lot C．a lot D．many 4．A．in B．at C．of D．for 5．A．are B．have C．is D．has 6．A．to eat B．eat C．eating D．eatting 7．A．healthy B．health C．habit D．habits 8．A．hard B．hardly C．often D．usually 9．A．but B．for C．of D．/ 10．A．healthy B．unhealthy C．health D．unhealth 第 1 页 共 7 页 学科网（北京）股份有限公司 $$ Unit 4 Eat Well 核心知识点精讲精练 2 (Grammar) 【主要内容】 · 【单元核心知识点精讲精练】每个单元按照教材安排分为Section A；Grammar和Section B三个部分。 · Grammar 精讲本单元的重点语法，讲解部分配有随学随练。 · 本资料设置了单元语法基础练习和单元语法提升练习，丰富多样的习题帮助学生更好地学习掌握并英语语法知识。 1、 单元重点语法解析 选择疑问句 1. 选择疑问句概述 (1) 选择疑问句是提供两种或两种以上的情况，问对方选择哪一种的问句。 (2) 提供的两种或两种以上的选项，在最后两个选项之间用连词or连接。 Which soup would you like, fish or chicken? 您想要什么汤，鱼汤还是鸡汤？ Would you like an apple, a pair of a banana? 你想要一个苹果，梨子还是香蕉？ (3) 朗读时 or 前用升调，or 后面用降调，句末用问号。 2. 选择疑问句的句型结构 (1) 一般疑问句 + or + 另一个备选对象? Would you like some tea or coffee?你要茶水还是咖啡? (2) 特殊疑问句+ or + 另一个备选对象? What kind of sport do you like, football or swimming? 你喜欢什么运动，足球还是游泳？ 3. 选择疑问句的回答 (1) 选择疑问句不用Yes / No 回答，一般在所提供的选项范围内选择回答，有时需要时具体情况灵活回答。 (2) 回答时一般用一个完整的陈述句，也可以是简略形式，省略主语和谓语。 —What size do you need, 37 or 38 ? 你要什么尺寸，37码还是38码？ —38. 38码。 —Which do you like best, coffee, water or juice? 你最喜欢哪一种，咖啡、水还是果汁？ —None. I only like tea. 都不喜欢。我只喜欢茶。 [随学随用] 单项填空。 (1) —Can you play the piano or the violin? —________. A．Yes, I can B．No, I can’t C．I can play the piano D．I don’t know 【答案】C 【详解】句意：——你会弹钢琴还是拉小提琴？——我会弹钢琴。 考查选择疑问句。根据“Can you play the piano or the violin?”可知，问句是选择疑问句，所以要给出明确选择，不能用yes或no回答，故选C。 (2) —Peter, ________ you play football ________ basketball? —I can play basketball. A．do; or B．can; or C．do; and D．can; and 【答案】B 【详解】句意：Peter，你可以踢足球还是打篮球？——我可以打篮球。 考查一般疑问句以及连词辨析。can能够；do助动词；or或者；and和。根据答语“I can play basketball.”可知，第一空填can。这是一个选择性疑问句，连词用or，故选B。 (3) —Is your uncle a policeman or a doctor? —________. He works in a hospital. A．Yes, he is B．No, he isn’t C．He is a policeman D．He is a doctor 【答案】D 【详解】句意：——你叔叔是警察还是医生？——他是一名医生。他在一家医院工作。 考查选择疑问句的回答。Yes, he is是的，他是；No, he isn’t不，他不是；He is a policeman他是一名警察；He is a doctor他是一名医生。根据“Is your uncle a policeman or a doctor?”可知，这是选择疑问句，排除选项A、B；结合“He works in a hospital.”可知，此处应该说他是医生。故选D。 (4) —Would you like some beef or some mutton? — ________. A．Yes, I would B．Yes, please C．Yes, some beef D．Some beef, please 【答案】D 【详解】句意：——你想要牛肉还是羊肉？ ——请给我一些牛肉。 考查选择疑问句。Yes, I would是的，我愿意；Yes, please是的，请；Yes, some beef是的，一些牛肉；Some beef, please请给我一些牛肉。根据“Would you like some beef or some mutton?”可知，问句是选择疑问句，不能用Yes或No回答，应从所给的选项中选一个作答。故选D。 (5) —Would you like some tea ________ coffee? —Either is OK. A．or B．and C．but D．so 【答案】A 【详解】句意：——你想喝茶还是咖啡？——两者都可以。 考查并列连词辨析。or或者；and和；but但是；so所以。根据“Would you like some tea...coffee ?”以及答语可知，这是一个选择疑问句，应用or连接，故选A。 按要求完成句子。 (1) 你想要哪个，米饭还是饺子？ you like, rice dumplings? 【答案】 Which would or 【详解】结合中英文提示可知，此处应“想要哪个”和“或者”。which“哪一个”，在该句中引导选择疑问句，且句首首字母大写；又结合“…you like”可知，“想要”的英文表达为“would like”；“或者”的英文表达为or。故填Which；would；or。 (2) They’d like to order Beijing roast duck.  (用hot pot连接改为选择疑问句) they like to order Beijing roast duck hot pot? 【答案】 Would or 【详解】句意：他们想点北京烤鸭。句中“They’d”为“They would”的缩写，变选择疑问句时，要把“would”置于句首，首字母大写；然后在两个选择项“Beijing roast duck”和“hot pot”之间用连词“or”连接，表示“或者；还是”，用来构成选择的关系。故填Would；or。 (3) My birthday is on May 4th.（用June 2nd改为选择疑问句） your birthday on May 4th on June 2nd? 【答案】 Is or 【详解】句意；我的生日在5月4日。选择疑问句为要将is放在句首，中间用or连接，故填Is；or。 (4) Is your home near your school? Is your home far away from your school? （将两个句子合并为一句） ? 【答案】Is your home near or far away from your school 【详解】句意：你家在学校附近吗？你家离学校远吗？根据句意可知合并为一句即改为用连词or连接的选择疑问句，去掉后句相同成分“Is your home”，用or连接即可。故填Is your home near or far away from your school。 (5) look, colours, you, better, or, do, cool, colours, warm, in(连词成句) ? 【答案】Do you look better better in warm colours or cool colours 【详解】根据所给词汇可知，句子是选择疑问句，助动词do放句首，主语是you，谓语动词是look better，两个选择项用or连接，in warm colours or cool colours。故填Do you look better better in warm colours or cool colours?“你穿暖色还是冷色的衣服更好看？” (6) go to school, you, or, by bike, do, by bus (?) ? 【答案】Do you go to school by bike or by bus/Do you go to school by bus or by bike 【详解】根据标点及词汇可知，句子是选择疑问句，by bike与by bus构成选择部分，主语是you，助动词用do，且要把助动词放在句首，后接动词原形，go to school固定短语，故填Do you go to school by bike or by bus/Do you go to school by bus or by bike“你是乘公共汽车上学还是骑自行车上学”。 可数名词与不可数名词 1. 可数名词 (1) 可数名词是表示可以计数的单个物体、人、想法等的名词。可数名词前可以直接加a/an或数词。 如：an orange 一个橙子；six oranges 六个橙子 a school 一个学校； some schools 一些学校 (2) 可数名词有单数和复数两种形式。可数名词单数变复数规则如下： 规则 变化 · 一般情况直接在词尾加-s。如：pencil→pencils; animal→animals · 以s,x,sh,ch结尾的名词，在词尾加-es。如：box→boxes; class→classes · 以辅音字母+y结尾的名词，将y改为i，再加-es。如：city→cities; baby→babies · 注意：toy, monkey等以元音字母+y结尾，变复数时直接在词尾加-s。 · 以-f或-fe结尾的名词，将-f或-fe改为v，再加-es。如：leaf→leaves叶子; knife→knives刀 (注意：giraffe复数为giraffes) · 以-o结尾的名词，一般生物加-es，非生物加-s。如：tomato→tomatoes；photo→photos 不规则 变化 · 单复数同形(单数和复数形式一样) 以下可数名词，单复数同形：Chinese; Japanese; deer(鹿); fish(鱼); sheep · 改变元音字母 a-e 类：man→men; woman→women oo→ee类：foot→feet; tooth→teeth(牙齿); goose→geese 其他：mouse→mice(老鼠) · 改变辅音字母 child→children; ox→oxen(公牛) (3) 复合名词 由两个名词共同构成的名词是复合名词 · 在变复数时，一般把后面的名词变为复数，前面的名词用单数。 · 如果前面的名词是man，woman，变复数时，man，woman也要变成复数形式。 如：an apple tree一棵苹果树；three apple trees 三棵苹果树 a man teacher 一名男教师；four men teachers 四名男教师 2. 不可数名词 (1) 不可数名词是表示通常不能看成单个个体的材料、液体、气体等的物体的名词。不可数名词一般不与a/an连用，前面也不直接加数字。大部分不可数名词都是单数，没有复数形式。 (2) 不可数名词量的表达：表达不可数名词的数量，通常用“冠词/数词+计量词+of+不可数名词”的结构。 如：a piece of cake 一块蛋糕；two pieces of cake 两块蛋糕 a cup of tea一杯茶；two cups of tea两杯茶 two kilos of chicken 两千克鸡肉 (3) 常见不可数名词： water水；juice果汁；tea茶；milk牛奶 rice米饭；bread面包；meat 肉；beef牛肉；mutton羊肉；pork猪肉 hair头发；paper纸；money钱 time时间；fun乐趣；work工作，love爱 3. 既可作可数名词也可作不可数名词的词 · 集体名词team, class, family等表示整体时用作单数，表示集体中的成员时，用作复数。 My family like watching TV. 我们一家人喜欢看电视。(指家庭成员，用作复数) His family is big. 他的家庭很大。(指家庭，看作整体，用作单数) · fish, chicken等既可以表示动物，也可以表示肉类；表示动物是可数名词，表示肉类是不可数名词。 I bought three fish. 我买了三条鱼。(指鱼，动物) I like eating fish. 我喜欢吃鱼。(指鱼肉，肉类) · food, fruit 表示泛指的食物或水果时是不可数名词，表示种类时是可数名词。 The fruit is nice. 这水果很不错。 He sells fruits. 他卖各种水果。 · glass表示“玻璃”，是材料名词，不可数；表示“玻璃杯”，是可数名词；表示“眼镜”时，总是用复数形式glasses。 · cabbage等蔬菜，水果名词被视为植物时，通常指整个水果或整棵蔬菜，是可数名词。表示“吃的食物”时(吃的食物会被分割)用作不可数名词。 · salad；ice cream；cake表示整体时，指“一份沙拉”，“一客冰淇淋”，“一个蛋糕”是可数名词；表示食物时(食用时被分割开了)，是不可数名词。 注意：cake表示“饼状物，饼”是可数名词。 · sweet表示“糖果”是可数名词；表示“甜点”，泛指食物是不可数名词，指某个具体的甜点是可数名词。 · drink在表示饮料的一种、一杯、一份、一口等时为可数名词；在泛指一般意义的“饮料”为不可数 名词。 · coffee和tea泛指“咖啡”或“茶”是不可数名词；表示“一杯咖啡”或“一杯茶”是可数名词。 [随学随练] 单项填空。 (1) —I’d like two ______ and two kilos of ______. —OK. Here you are. A．tomato; chickens B．potatoes; chickens C．potato; chicken D．tomatoes; chicken 【答案】D 【详解】句意：——我想要两个西红柿和两千克鸡肉。 ——好的。给你。 考查可数名词复数和不可数名词。tomato番茄；potato土豆；chicken鸡肉；chickens小鸡。空处①前有two修饰，所以此处用名词复数形式，排除A和C；空处②指的是两千克鸡肉，chicken作“鸡肉”时不可数，故选D。 (2) —What can you see on the farm? —I can see some ________ and ________. A．sheep; plant B．sheeps; plant C．sheep; plants D．sheeps; plants 【答案】C 【详解】句意：——你在农场看到了什么？——我可以看到一些绵羊和植物。 考查名词的数。some后接不可数名词或可数名词的复数形式，sheep单复同形；plant的复数为plants。故选C。 (3) I live a healthy life. I often have ________ and ________ for lunch. A．fish; eggs B．fishes; egg C．chickens; carrots D．chicken; carrot 【答案】A 【详解】句意：我过着健康的生活。我午餐经常吃鱼和鸡蛋。 考查名词的单复数形式。fish作为“鱼肉”时单复数同形；eggs是egg的复数形式；fishes通常指不同种类的鱼；chickens通常指鸡的复数；chicken鸡肉；carrots是carrot的复数形式。此处是关于午餐食物，因此fishes和chickens不符合，排除B、C，D项carrot应用复数形式，故选A。 (4) —Would you like some ________? —Yes, please. I like them very much. A．pear B．watermelons C．lemon D．strawberry 【答案】B 【详解】句意：——你想来点西瓜吗？——好的。我非常喜欢吃西瓜。 考查名词辨析。pear梨，可数名词；watermelons西瓜，可数名词复数；lemon柠檬，可数名词；strawberry草莓，可数名词。some后接可数名词复数或不可数名词，watermelons是复数形式。故选B。 (5) Nowadays, we can see more and more ________ on the buses. A．woman drivers B．woman’s drivers C．women’s driver D．women drivers 【答案】D 【详解】句意：如今，我们在公交车上可以看到越来越多的女司机。 考查名词复数形式。woman driver“女司机”，woman作定语修饰名词driver，变复数时，woman和driver需同时变为复数形式，即“women drivers”。故选D。 (6) —Good morning, Madam. Can I help you?   —Sure, I’d like ________ for cooking vegetables. A．two cups of tea B．three pieces of bread C．five kilos of oil D．four bottles of milk 【答案】C 【详解】句意：——早上好，女士。我能帮你吗？——当然，我想要五公斤油来做菜。 考查不可数名词。two cups of tea两杯茶；three pieces of bread三片面包；five kilos of oil五公斤油；four bottles of milk四瓶牛奶。根据“cooking vegetables.”可知是指要五公斤油来做菜。故选C。 (7) There _______ some orange juice and many _______ on the table. A．are; oranges B．is; oranges C．is; orange D．are; orange 【答案】B 【详解】句意：桌子上有一些橙汁和许多橙子。 考查主谓一致和名词的用法。分析句子结构可知，句子为there be句型，遵循就近原则，“some orange juice”为不可数名词，be动词应用is；根据空前“many”可知，此处应用名词复数形式oranges。故选B。 (8) —Mike’s family lives a healthy life. He with his parents often ________. —That’s true! They think walking is ________. A．takes exercise; good exercises B．do exercise; good exercises C．does exercise; good exercise D．take exercise; good exercise 【答案】C 【详解】句意：——迈克的家人过着健康的生活。他经常和父母在一起锻炼。 ——确实如此！他们认为散步是很好的锻炼。 考查主谓一致及名词。根据“He with his parents”可知，应遵循就远原则，主语“He”是第三人称单数形式，所以谓语动词用第三人称单数形式，故排除B、D项；exercise锻炼，不可数名词，第二空表示“散步是很好的锻炼”。故选C。 (9) I always have rice with ________ and a banana ________ lunch. A．fishes; for B．fishes; on C．fish; for D．fish; on 【答案】C 【详解】句意：我午餐总是吃米饭、鱼肉和一根香蕉。 考查名词以及介词辨析。for为了；on在……上。fish作“鱼肉”讲时为不可数名词，have…for lunch“午餐吃……”，是固定词组。故选C。 (10) —Can I help you? —Yes. ________, please. A．Two cup of teas B．Two cups of teas C．Two cups of tea D．Two cup of tea 【答案】C 【详解】句意：——我能帮你吗？——是的。请来两杯茶。 考查不可数名词的表达。tea“茶”，不可数名词，没有复数形式，a cup of“一杯”，基数词two后应用名词复数形式。故选C。 (11) There are some ________and ________ on the table. A．potatoes; tea B．chicken; sweets C．tomatos; porks D．tomatos; milk 【答案】A 【详解】句意：桌子上有些土豆和茶。 考查名词复数。根据题目中的some和are可知就近原则，紧接着单词是可数名词复数形式， B选项的chicken在这里是不可数名词，C和D选项中的tomato的复数形式是tomatoes，这三个选项都错误；A选项potatoes和tea符合题意。故选A。 (12) —How many ________ are there on the table? —Eighteen. A．milk B．milks C．bottle of milk D．bottles of milk 【答案】D 【详解】句意：——有多少瓶牛奶在桌子上？——18瓶。 考查不可数名词及其数的表达。How many后跟可数名词复数形式，milk为不可数名词，需借助量词“bottle”表示数量，且“bottle”要用复数形式。故选D。 2、 单元语法基础练习 单项填空 (1) —Is your favorite color a warm color or a cool color? —__________ A．A cool color. B．Yes, a warm color. C．No, I like cool color better. D．A hotter color. 【答案】A 【详解】句意：——你最喜欢的颜色是暖色还是冷色？——冷色。 考查选择疑问句的回答。回答选择疑问句时，不使用yes/no；回答时二者选其一或都选或都不选。故选A。 (2) —Do you like Maths or English? —________. It’s great fun to learn another language. A．Yes, I do B．No, I don’t C．English D．Maths 【答案】C 【详解】句意：——你喜欢英语还是数学？——英语。学另一门语言是很有趣的。 考查选择疑问句。选择疑问句的回答只能选择其中之一作回答，不能用yes/no来回答，又根据“It’s great fun to learn another language.”可知，说话人认为学另一门语言是很有趣的，“英语”符合题意。故选C。 (3) —Do you like swimming or running, Alice?    —___________ A．Yes, I do B．No, I don’t. C．I like both. D．No, I do. 【答案】C 【详解】句意：——爱丽丝，你喜欢游泳还是跑步？——两者我都喜欢。 考查选择疑问句。Yes, I do.是的，我是；No, I don’t.不, 我不是；I like both.我两个都喜欢；No, I do.表达错误。根据“Do you like swimming or running, Alice?”可知，本句为选择疑问句，不能用Yes或No来回答，要从or的前后两个选择项中选择一项、两项或都不选。此处是“两者我都喜欢”，故选C。 (4) —Do ______ like going to ______? —I don’t know, maybe everyone likes something new, right? A．woman teachers; clothes shops B．women teachers; clothes shops C．woman teachers; sport shops D．women teachers; vegetables shops 【答案】B 【详解】句意：——女教师喜欢去服装店吗？——我不知道，也许每个人都喜欢新的东西，对吧？ 考查复合名词的复数。“man/woman+名词”构成的复合名词，两个词都要变成复数形式，排除选项A、C；无核心词的复合名词，应在词尾变复数。故选B。 (5) For lunch, we have some ________ and ________. A．rices; vegetable B．rices; vegetables C．rice; vegetable D．rice; vegetables 【答案】D 【详解】句意：午餐，我们吃一些米饭和蔬菜。 考查名词的数。rice米饭，不可数名词；vegetable蔬菜，可数名词。根据some后接不可数名词或可数名词复数可知，选项D符合题意。故选D。 (6) —Do you do eye ________ every day at school? —Yes. And we also do morning ________ to build up our body. A．exercise; exercise B．exercises; exercise C．exercise: exercises D．exercises; exercises 【答案】D 【详解】句意：——你每天在学校做眼保健操吗？——是的。我们还会做早餐来强健身体。 考查exercise的用法。exercise表示抽象的“锻炼”概念时，是不可数名词；表示具体的“练习、体操”等时，是可数名词。空一处表示“做眼保健操”，用do eye exercises；空二处表示“做早操”，用do morning exercises。故选D。 (7) This ______ and this pair of ______ are made of ______. A．glass, glasses, glasses B．glasses, glass, glass C．glasses, glasses, glass D．glass, glasses, glass 【答案】D 【详解】句意：这个玻璃杯和这副眼镜都是玻璃做的。 考查名词的用法。glass作为“玻璃杯”时是可数名词，this后加可数名词单数，排除BC；glasses意为“眼镜”，通常用复数，this pair of glasses“这副眼镜”；第三个空表示材料，glass表示“玻璃”时，是不可数名词。故选D。 (8) —May I have ________? — Sure. Here you are. A．any coffee B．some coffee C．any coffees D．some coffees 【答案】B 【详解】句意：——我可以要一些咖啡吗？——当然。给你。 考查代词辨析以及名词的用法。some一些；any一些。coffee“咖啡”，不可数名词，排除CD；此处句子是希望得到肯定回答的疑问句，用some。故选B。 (9) Today the pandas still don’t have ________ to eat. A．enough food B．food enough C．enough foods D．foods enough 【答案】A 【详解】句意：今天熊猫没有足够的食物可吃。 考查名词。enough“足够的”，修饰名词时，位于名词前，排除BD两项。food“食物”，是不可数名词，enough food “足够的食物”，故选A。 (10) For lunch, we have rice, fruit and ________ here and we can make ________ salad. A．vegetables; vegetables B．vegetable; vegetable C．vegetables; vegetable D．vegetable; vegetables 【答案】C 【详解】句意：午餐我们有米饭、水果和蔬菜，我们还可以做蔬菜沙拉。 考查名词的数和名词作定语。第一空根据“For lunch, we have rice, fruit and…here”可知，这里指有米饭、水果和蔬菜，应用复数形式vegetables表泛指；第二空根据“we can make…salad.”可知，此处应用名词vegetable作定语修饰名词salad。故选C。 (11) How much _________ do you want? A．tomatoes B．bananas C．hamburgers D．chicken 【答案】D 【详解】句意：你想要多少鸡肉？ 考查名词的数。tomatoes 西红柿，可数名词；bananas香蕉，可数名词； hamburgers汉堡包，可数名词； chicken鸡肉，不可数名词。how much 后接不可数名词，只有D为不可数名词，故选D。 (12) —What else do we need to make the dumplings, Mom? —We need ________. A．two spoon salt B．two spoons of salts C．two spoons of salt D．two spoon of salt 【答案】C 【详解】句意：——妈妈，我们还需要什么来煮饺子？——我们需要两勺盐。 考查不可数名词数量的表达。分析句子可知，此处表达“两勺盐”，salt“盐”，不可数名词，前面不可直接用数字，可借助量词spoon“勺”来表示，spoon是可数名词，两勺盐表达为“two spoons of salt”。故选C。 (13) —I see ________ on the table. Are they for us, Dad? —Yes. One is for you and the other is for your brother. A．two bowl of dumpling B．two bowls of dumpling C．two bowl of dumplings D．two bowls of dumplings 【答案】D 【详解】句意：——我在桌子上看见两碗饺子。爸爸，它们是给我们的吗？——是的。一碗给你，另一碗给你弟弟。 考查数词用法。bowl可数名词，two后接复数，two bowls of后接dumpling复数。故选D。 (14) —What can I do for you, Madam? —I would like some ________ and ________. A．sandwich; sugar B．sandwiches; sugars C．sandwiches; sugar D．sandwich; sugars 【答案】C 【详解】句意：——夫人，我能为您效劳吗？——我想要一些三明治和糖。 考查名词的数。some后跟可数名词复数形式/不可数名词。sandwich“三明治”，可数名词，其复数形式为sandwiches，可排除AD选项；sugar“糖”，不可数名词。故选C。 (15) —________ pork would you like? —One and a half ________. A．How many; kilo B．How many; kilos C．How much; kilos D．How much; kilo 【答案】C 【详解】句意：——你要多少猪肉？——1.5千克。 考查特殊疑问词和名词。How many“多少”，对可数名词复数提问；How much“多少”，对不可数名词提问。pork意为“猪肉”，是不可数名词，用How much提问；“one and a half”数量大于1，kilo要加s。故选C。 (16) Look! Some ________ is in the bag and some ________ are in the basket A．bread; chicken B．vegetable; bread C．bananas; apples D．bread; strawberries 【答案】D 【详解】句意：看！一些面包在袋子里，一些草莓在篮子里。 考查名词的用法。bread面包，不可数名词；chicken鸡肉（不可数名词），鸡（可数名词）；vegetable蔬菜，可数名词；banana香蕉，可数名词；apple苹果，可数名词；strawberry草莓，可数名词。some后接不可数名词或可数名词的复数形式，根据is可知，第一空填不可数名词，根据are可知，第二空填可数名词复数形式，故选D。 根据所给的图片及首字母提示，用合适的单词填空补全对话 Tom: What would you like to drink? Tea, coffee, or milk? Sarah: I’d just like a cup of t 1 , please. Tom: What would you like to eat? Sarah: Just a moment. I’ll look through the menu first. Tom: How about d 2 with beef and o 3 ? Sarah: I don’t like their flavour. Please give me some p 4 . Also, I’d like a vegetable s 5 . Tom: Would you like some soup? Sarah: Do you have m 6 soup? I like mutton. If you do, I’ll have a serving, please. Tom: Of course. 【答案】1．(t)ea 2．(d)umplings 3．(o)nion 4．(p)orridge 5．(s)alad 6．(m)utton 【导语】本文是餐馆就餐时点餐的一段对话。 1．句意：请给我一杯茶。根据图片提示及“a cup of”可知，此处指一杯茶，tea“茶”，不可数名词，故填(t)ea。 2．句意：牛肉洋葱馅的饺子怎么样？根据图片可知此处指“饺子”，dumpling“饺子”，经常用复数形式表示类别，dumpling的复数为dumplings，故填(d)umplings。 3．句意：牛肉洋葱馅的饺子怎么样？根据图片可知此处指“洋葱”，onion“洋葱”，此处指做饭的材料，所以onion为不可数名词，故填(o)nion。 4．句意：请给我来一些粥。根据图片可知此处指“粥”；porridge“粥”，不可数名词，故填(p)orridge。 5．句意：我还想要一盘蔬菜沙拉。根据图片可知此处指“沙拉”；salad“沙拉”，根据 “a”可知此处用单数名词，故填(s)alad。 6．句意：你有羊汤吗？根据图片可知此处指“羊肉”，mutton“羊肉”，mutton soup“羊汤”，符合语境，故填(m)utton。 3、 单元语法提升练习 1. 根据首字母提示补全单词或用所给词的适当形式填空。 Hi, I’m Sally. I w 1 like to have juice and 2 (bread) in the morning. I don’t like 3 (egg), although (虽然) I know they are good for me. M 4 one day I’ll try to eat them with milk. Oh, I like hot p 5 very much. I always have 6 (cabbage), mushrooms and 7 (potato) in it. I also like t 8 and noodles, but I don’t like eggplants in it. My brother is different from me. He likes meat. He likes chicken and fish. He doesn’t like rice or 9 (dumpling). It’s not r 10 . He should have more main food. 【答案】 1．(w)ould 2．bread 3．eggs 4．(M)aybe 5．(p)ot 6．cabbages 7．potatoes 8．(t)ofu 9．dumplings 10．(c)orrect 【导语】本文主要介绍了Sally和她的兄弟在饮食习惯上的不同。 1．句意：我早上想喝果汁和吃面包。would like to do“想要做”。故填(w)ould。 2．句意：我早上想喝果汁和吃面包。bread“面包”，不可数名词，故此处用原形。故填bread。 3．句意：我不喜欢鸡蛋。egg“鸡蛋”，可数名词，此处应用复数表示泛指。故填eggs。 4．句意：也许有一天我会试着和牛奶一起吃。根据“one day I’ll try to eat them with milk.”和“although (虽然) I know they are good for me”可知，虽然知道鸡蛋对自己有好处，但是还是不喜欢，也有有一天会试着和牛奶一起吃。maybe“也许”，副词。故填(M)aybe。 5．句意：哦，我非常喜欢火锅。根据“hot”和所给首字母可知，hot pot“火锅”。故填(p)ot。 6．句意：我总是在里面放卷心菜、蘑菇和土豆。cabbage“卷心菜”，可数名词，应用复数表示泛指。故填cabbages。 7．句意：我总是在里面放卷心菜、蘑菇和土豆。potato“土豆”，是可数名词，此处应用复数表示泛指。故填potatoes。 8．句意：我也喜欢豆腐和面条，但我不喜欢里面放茄子。根据“I also like...and noodles”和所给首字母可知，此处可表示喜欢“豆腐”tofu。故填(t)ofu。 9．句意：他不喜欢米饭或饺子。dumpling“饺子”，可数名词，此处应用复数表示泛指。故填dumplings。 10．句意：这是不对的。根据“He should have more main food (主食).”和上文“He likes meat.”以及“He doesn’t like rice or...”可知，他喜欢肉，不喜欢米饭或饺子，这是不对的，应用形容词right“正确的”作表语。故填(r)ight。 2. 补全对话 (1) 根据对话内容，从选项中选出能填入空白处的最佳选项，其中有两个为多余选项。 A: Mum, I’d like to help cook dinner. B: Really? A: 1 B: All right. A: 2 B: Emm… Let me see. Boil some water and then stir two eggs. A: That’s easy. B: OK. Now give me some meat and potatoes. A: 3 B: Three. And bring four peppers. A: 4 B: Now wash them, and then cut the potatoes and peppers up. At last, slice the meat. A: They are a little difficult for me. I guess cooking is not easy. B: 5 A: I’m happy that I can help you. A．OK. Here you are. B．OK. Now how can I help? C．Do you want some yogurt? D．But you do these things well. E．You need to buy some tomatoes. F．How many potatoes do you need? G．I’d like to do something special for you on your birthday. 【答案】1．G 2．B 3．F 4．A 5．D 【导语】本文主要讲述了一次烹饪经历。A想帮助B做晚餐，B指导A如何准备食材和进行简单的烹饪步骤。 1．根据“I’d like to help cook dinner.”和“Really?”可知是在询问对方是不是真的想帮助做晚餐。选项G“我想在你生日那天为你做点特别的事。”符合语境。故选G。 2．根据“Emm… Let me see. Boil some water and then stir two eggs.”可知询问接下来需要做什么。选项B“好的。我能帮什么忙吗？”符合语境。故选B。 3．根据“Three.”可知是询问数量。选项F“你需要多少土豆？”符合语境。故选F。 4．根据“Three. And bring four peppers.”可知是A拿东西给B。选项A“好的。给你。符合语境。故选A。 5．根据“They are a little difficult for me. I guess cooking is not easy.”和“I’m happy that I can help you.”可知此处是在鼓励A。选项D“但你这些事都做得很好。”符合语境。故选D。 (2) 根据对话内容，从下面选项中选出适当的选项补全对话。其中有两项为多余选项。 A: Hi, Jim. It’s time for lunch. B: Hi, Betty. 1 A: Yes, I’d love to. 2 B: Noodles. Is that OK with you? A: Yes. 3 B: Great! How about going to Noodle House? A: Sounds good. 4 B: Yes. How do we get there? A: 5 It’s not far away from our school. B: OK Let’s go. A．Let’s walk there. B．I love noodles, too. C．It’s about 35 minutes by bus. D．What’s the best restaurant in our city? E．Would you like to have lunch with me? F．What do you want to have, rice or noodles? G．I think it’s the best place to have noodles in our city. 【答案】1．E 2．F 3．B 4．G 5．A 【导语】本文是Jim和Betty相约去吃面条的对话。 1．根据“Yes, I’d love to.”可知此处是邀请对方做某事，E选项“你要与我一起吃午饭吗”符合情景。故选E。 2．根据“Noodles.”可知此处是询问对方想要吃什么，F选项“你想要吃什么，米饭还是面条”符合情景。故选F。 3．根据“Is that OK with you?”可知吃面条对方是否喜欢，B选项“我也喜欢面条”符合情景。故选B。 4．根据“How about going to Noodle House?”可知此处对面店的评价，G选项“我认为这是我们城市吃面条最好的地方”符合情景。故选G。 5．根据“How do we get there?”可知此处询问交通方式，A选项“让我们走路去那吧”符合情景。故选A。 3. 完形填空 How often do you get chocolate and chips? Five 1 a week? That’s a bad 2 habit. Every day we eat 3 food. Some are good for our health and some are bad 4 our health. What’s good food? Here 5 a food pyramid (金字塔). Every day we should eat bread and rice, we should 6 some vegetables and fruit, maybe two apples or three oranges. A lot of bread, rice, vegetables and fruit help us keep in good 7 . We should have one glass or two glasses of milk and less fish, meat, chicken or eggs. Of course, we should 8 ever eat junk food. Although sweets (甜食) and cola are very delicious, 9 we can’t often eat them. They’re 10 food. 1．A．time B．a time C．times D．/ 2．A．eat B．to eat C．eats D．eating 3．A．lots of B．lot C．a lot D．many 4．A．in B．at C．of D．for 5．A．are B．have C．is D．has 6．A．to eat B．eat C．eating D．eatting 7．A．healthy B．health C．habit D．habits 8．A．hard B．hardly C．often D．usually 9．A．but B．for C．of D．/ 10．A．healthy B．unhealthy C．health D．unhealth 【答案】 1．C 2．D 3．A 4．D 5．C 6．B 7．B 8．B 9．D 10．B 【导语】本文主要介绍了健康食物和不健康食物。 1．句意：每周五次吗？ time次数，单数；a time一次；times次数，复数。根据“Five”可知，此处指一周五次，应该使用复数。故选C。 2．句意：这是一个坏的饮食习惯。 eat吃，原形；to eat吃，不定式；eats吃，单三；eating吃，现在分词。根据“That’s a bad…habit.”可知，此处需要填入表示“饮食的”的形容词，作定语修饰habit，现在分词可以作定语。故选D。 3．句意：每天我们都要吃许多东西。 lots of许多；lot许多，不单独使用；a lot非常；many许多，加可数名词。根据“food”可知，此处指许多食物，food不可数。故选A。 4．句意：有些食物对我们的健康有益，有些则有害。 in在……里；at在……；of……的；for对……，为……。根据“bad…our health”可知，此处指有些食物对健康有害。故选D。 5．句意：这里有一个食物金字塔。 are是，主语是第二人称或复数；have有，动词原形；is是，主语是三单；has有，动词三单。根据“Here”可知，此处是Here be句型，表示“这有……”，主语a food pyramid“一个食物金字塔”是单数。故选C。 6．句意：我们应该吃一些蔬菜和水果，也许是两个苹果或三个橘子。 to eat吃，不定式；eat吃，原形；eating吃，现在分词；eatting错误形式。“should”是情态动词，后加动词原形。故选B。 7．句意：大量的面包，米饭，蔬菜和水果有助于我们保持良好的健康。 healthy健康的，形容词；health健康，名词；habit习惯，单数；habits习惯，复数。keep in good health“保持良好的健康”，是固定搭配。故选B。 8．句意：当然，我们应该几乎不吃垃圾食品。 hard努力地；hardly几乎不；often经常；usually通常。根据“eat junk food”可知，垃圾食品应该尽量不要吃。故选B。 9．句意：尽管甜食和可乐非常美味，但我们不能经常吃它们。 but但是；for对……，为……；of……的。根据“Although”可知，此处是让步状语从句，although不能和but连用。故选D。 0．句意：它们是不健康的食物。 healthy健康的，形容词；unhealthy不健康的，形容词；health健康，名词；unhealth病态，名词。根据“we can’t often eat them”可知，此处在解释不能多吃甜食和可乐的原因是它们是不健康的。故选B。 第 1 页 共 7 页 学科网（北京）股份有限公司 $$