Unit 8 Lesson1 Why are plants important（分层练习）英语新教材冀教版七年级下册

Lesson1 Why are plants important 一、英汉互译 ① be made from ___________ ② play a part in ______________ ③ 带走 ____________ ④ be important for ______________ ⑤ 居住 ____________ ⑥ clean the air ______________ 【答案】 1.由...制成 2.在...中扮演角色 3.carry...away 4. 对...是重要的 5.live in 6.净化空气 2、 单项选择 1．The old man needs someone ________ him ________ the bag. A．to help; carry B．help; carries C．to help; carrying D．help; to carry 【答案】A 【解析】句意：这个老人需要一个人帮他搬这个袋子。 考查非谓语动词。根据短语need sb. to do sth.需要某人做某事可知，第一个空需要用动词不定式的形式，help的不定式形式是to help；根据短语help sb. (to) do sth.帮助某人做某事可知，第二个空用动词原形或动词不定式。故选A。 2．This pair of trousers_________leather. May I ________? A．is made of; try it on B．are made from; try them on C．is made of; try them on D．are made from; try it on 【答案】C 【解析】句意：这条裤子是皮做的。我可以试穿一下吗？ 考查主谓一致和代词的用法。根据“This pair of trousers”可知，强调的是“pair”，所以be动词用is，排除选项BD；“trousers”为复数形式，指代“trousers”用代词“them”。故选C。 3．It’s important for us ________ hard in order to have a better life. A．work B．to work C．working D．works 【答案】B 【解析】句意：为了过上更好的生活，努力工作对我们来说很重要。 考查非谓语动词。根据“It’s important for us ... hard”可知，此处是it’s+形容词+for sb to do sth“做某事对某人来说是怎么样的”，空处用不定式作主语。故选B。 4．It’s important for ________ to keep ________. A．we; health B．us; health C．we; healthy D．us; healthy 【答案】D 【解析】句意：对我们来说，保持健康很重要。 考查人称代词宾格和形容词用法。we“我们”，人称代词主格；us“我们”，人称代词宾格；health“健康”，名词；healthy“健康的”，形容词。第一空，空前为介词“for”，这里应用人称代词宾格us，排除A和C；第二空，空前为系动词“keep”，这里应用形容词healthy作表语，排除B。故选D。 5．Will Jill play a part in ___________ the plan for English study？ A．make B．makes C．made D．making 【答案】D 【解析】句意：吉尔会在制定英语学习计划中发挥作用吗？ make制作，动词原形；makes第三人称单数形式；made过去式；making动名词。play a part in+名词/代词/动名词，在……发挥作用。故选D。 三、补全对话 根据下面的对话情景，在每个空白处填上一个恰当的句子，使对话的意思连贯、完整。 A: Morning, Nick. What are you going to do tomorrow? B: I have no plans yet. 1 ? A: I will go to Beishan Park to plant trees. B: 2 . It’s good for our city environment. A: Yes. The more trees, the fresher the air will be. B: Yeah! 3 ? A: My teacher Ms. Jones and my classmates. 4 ? B: Sure, I’d love to. 5 . A: In our classroom.You must get there before eight. B: OK, see you then. 【答案】1．What/How about you 2．That’s/That sounds good/great/That’s a good idea 3．Who will go/is going with you 4．Would you like to join us 5．Where (and when) shall/will we meet 【解析】本文是A、B两个人的对话，A和B沟通明天要做的事情。最后他们决定和老师，同学们一起去北山公园种树，并且约定了明天见面的时间和地点。 1．根据“What are you going to do tomorrow?”和“I have no plans yet.”可知，这里B想询问A的看法，对于征询对方意见及看法，可用特殊疑问句“What about you?”或“How about you?”，表示“你呢？”。故填What/How about you。 2．根据“I will go to Beishan Park to plant trees.”和“It’s good for our city environment.”可知，B觉得种树是一个不错的建议，对于赞同对方所提出的建议，可用陈述句“That’s good/great.”太好了；“That sounds good/great.”那听起来不错；“That’s a good idea.”那是一个好主意。故填That’s/That sounds good/great/That’s a good idea。 3．根据“My teacher Ms. Jones and my classmates.”可知，B想询问你与谁一起去，对人提问，可用特殊疑疑问词who；根据“tomorrow”可知，时态为将来时。故填Who will go/is going with you。 4．根据“Sure, I’d love to.”可知，A询问的是B是否愿意一起去，对于邀请某人一起去做某事，可用“Would you like to do?”。故填Would you like to join us。 5．根据“In our classroom. You must get there before eight.”可知，这里询问的是见面时间和地点，对时间提问用特殊疑问词when；对地点提问用特殊疑问词where；根据“tomorrow”可知，时态为将来时。故填Where (and when) shall/will we meet。 四、完形填空 Water is very important to living things. Without water there can be no 1 on Earth. All animals and plants need water. 2 also needs water. We need water to drink. to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere. There is water in seas, rivers and 3 . Water is found almost everywhere. Even in the 4 part of the world, there is some water in the air. You cannot see or feel it when it is a part of the 5 . The water in the seas, rivers and lakes is a liquid (液体). The water in the air is a 6 , and we call it water vapor. Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals (结晶体). Snow crystals are very, very small crystals of ice. Ice is frozen water. It is a solid. There can be 7 and ice everywhere in winter. Some people think there’s 8 water on Earth. In fact, there is only enough water for us to use now. If we don’t 9 it, it will surely be used out some day. To protect water is to protect 10 . Do you think so? 1．A．birds B．trees C．fish D．life 2．A．Animals B．Plants C．People D．Food 3．A．air B．lakes C．pools D．bathrooms 4．A．highest B．hottest C．coldest D．driest 5．A．air B．sea C．river D．ice 6．A．light B．gas C．sound D．color 7．A．rain B．storm C．snow D．sunlight 8．A．little B．no C．not much D．much 9．A．drink B．save C．use D．pollute 10．A．friends B．parents C．ourselves D．teachers 【答案】 1．D 2．C 3．B 4．D 5．A 6．B 7．C 8．D 9．B 10．C 【解析】本文主要讲述了水对生物的重要性以及水在自然界中的存在形式。 1．句意：没有水，地球上就没有生命。 birds鸟；trees树；fish鱼；life生命。根据上文“Water is very important to living things.”可知，水对生物非常重要，没有水就没有“生命”。此处使用“life”意为“生命”符合语境。故选D。 2．句意：人们也需要水。 Animals动物；Plants植物；People人们；Food食物。根据下文“We need water to drink, to cook our food and to clean ourselves.”可知，此处指“人们”在生活中需要水。此处使用“People”意为“人们”符合语境。故选C。 3．句意：在海洋、河流和湖泊中有水。 air空气；lakes湖泊；pools水池；bathrooms浴室。根据“There is water in seas, rivers and...Water is found almost everywhere.”可知，水存在于海洋、河流和“湖泊”中，到处都能够发现水。此处使用“lakes”意为“湖泊”符合语境。故选B。 4．句意：即使在世界上最干燥的地方，空气中也有一些水。 highest最高的；hottest最热的；coldest最冷的；driest最干燥的。根据“Water is found almost everywhere. Even in the...part of the world, there is some water in the air.”可知，到处都能够发现水，即使在“最干燥”的地方，空气中也有水。使用“driest”意为“最干燥的”符合语境。故选D。 5．句意：当它是空气的一部分时，你看不到或感觉不到它。 air空气；sea海洋；river河流；ice冰。根据“there is some water in the air. You cannot see or feel it when it is a part of the...”可知，水是“空气”的一部分时，看不见也摸不着。此处使用“air”意为“空气”符合语境。故选A。 6．句意：空气中的水是一种气体，我们称之为水蒸气。 light光；gas气体；sound声音；color颜色。根据“The water in the air is a...and we call it water vapor.”可知，空气中的水是“气体”，被称为水蒸气。此处使用“gas”意为“气体”符合语境。故选B。 7．句意：冬天到处都会有雪和冰。 rain雨；storm风暴；snow雪；sunlight阳光。根据“Ice is frozen water. It is a solid. There can be...and ice everywhere in winter.”可知，在冬天到处都有“雪”和冰，这是常识。此处使用“snow”意为“雪”与“ice”对应，符合冬季寒冷的语境。故选C。 8．句意：有些人认为地球上有大量的水。 little很少；no没有；not much不多；much很多。根据“In fact, there is only enough water for us to use now.”可知，有些人认为地球上有“大量、很多”的水。此处使用“much”意为“大量、很多”符合语境。故选D。 9．句意：如果我们不节约用水，总有一天它肯定会被用完。 drink喝；save节约；use使用；pollute污染。根据“it will surely be used out some day”可知，如果不“节约”用水，水总有一天会被用完。此处使用“save”意为“节约”符合语境。故选B。   10．句意：保护水就是保护我们自己。 friends朋友；parents父母；ourselves我们自己；teachers老师。根据“To protect water is to protect...”可知，句中表述保护水就是保护“我们自己”。此处使用反身代词“ourselves”意为“我们自己”符合语境。故选C。 五、阅读理解 (A) Space Club     Are the stars calling you? Why not meet with us at the Space Club every Friday night at 6 p.m.? We learn about the stars in a fun way. Are you interested in the universe (宇宙)? Come and join us this Friday evening! For more information, call Leo at 5968-4437 before 2 p.m. this Thursday. Gardening Club     Like getting your hands dirty and watching plants grow? Our Gardening Club meets every Saturday morning at 9 a.m. We’ll show you how to plant in the garden. Get ready to plant your own flowers and vegetables! Come with us this weekend. Find out more at tinyurl.com/TWJ-gardenclub. Story-telling Club     Love telling stories? Join our English Story-telling Club! We meet every Wednesday after school at 3:30 p.m. Tell your stories, listen to others, and be better at telling stories in an interesting way. We play cool games like Story Circle. Let’s build a story together. It’s all about fun! Come and join us this Wednesday. Please call Sam at 235-1143 for more information. 1．What can you do in the Gardening Club? A．Study the stars. B．Play cool games. C．Learn to plant. D．Tell some stories. 2．When should Susan go if she joins the Story-telling Club? A．Every Friday night at 6 p.m. B．Every Saturday morning at 9 a.m. C．Every Thursday afternoon at 2 p.m. D．Every Wednesday afternoon at 3:30 p.m. 3．In which part of a newspaper can we read this text? A．Science study. B．Students’ life. C．Travel stories D．Sports news. 【答案】21．C 22．D 23．B 【解析】本文介绍了三个俱乐部，包括活动内容、活动时间以及联系方式。 1．细节理解题。根据“Gardening Club”下面的“We’ll show you how to plant in the garden. Get ready to plant your own flowers and vegetables!”可知，在园艺俱乐部，你可以学习种植。故选C。 2．细节理解题。根据“Story-telling Club”下面的“We meet every Wednesday after school at 3:30 p.m.”可知，如果Susan加入讲故事俱乐部，她应该在每周三下午3:30去参加活动。故选D。 3．推理判断题。本文介绍了三个不同的俱乐部，主要涉及学生的课外活动和兴趣爱好，因此最适合出现在 报纸的“学生生活”板块。故选B。 (B) Why do the leaves on trees have different colors? What makes them change their colors? Leaves use sunlight, water and air to make food for the trees. This way of making food is called photosynthesis (光合作用). Photosynthesis is important to animals as well as plants. Some animals eat plants. Other animals eat these animals. Summer is playtime. For the leaves of many trees, however, it’s work, work, work! The sun is shining. The leaves are making food for the trees. The trees keep more than enough food deep inside. Leaves are green in summer because they are making food. Leaves also have orange, yellow, or brown colors inside them. During summer, those colors are covered by the green color. Many places get colder in autumn with shorter days and longer nights. Trees get less sunlight, so photosynthesis slows down. Over time, leaves stop making the green chemical (化学物质). The orange, yellow, and brown colors grow when that happens. Once it gets cold enough and ice appears at night, the trees drop their leaves. They do this to keep themselves safe. If the leaves are icy while still on the trees, the trees can be hurt. Trees that drop their leaves are bare (光秃秃) in winter. They use the food they save in summer to get through the cold days and nights. Spring comes before long. Ice and snow disappear and the rains come. The sun shines, and tiny leaves grow from branches. Once again, the leaves use sunlight, water and air to make food. The cycle begins again. 1．What is photosynthesis according to the passage? A．It is a way of growing leaves. B．It is a way of changing colors. C．It is a way to make food for plants. D．It is a way for animals to eat plants. 2．What stops leaves from making the green chemical in autumn? A．Less air in autumn. B．Less sunlight in autumn. C．Less water in autumn. D．Less time in autumn. 3．What does the underlined word “They” in Paragraph 5 refer to? A．The trees. B．The leaves. C．The colors. D．The animals. 4．What would be the best structure of the passage? A．B．C． D． 5．What is the best title of the passage? A．The importance of the sunlight B．The trees in different seasons C．The colors of the tree leaves D．The changes of the four seasons 【答案】1．C 2．B 3．A 4．B 5．C 【解析】本文是一篇说明文。主要讲述了树叶在不同季节的颜色变化及其原因，特别是光合作用在其中的作用。 1．细节理解题。根据“Leaves use sunlight, water and air to make food for the trees. This way of making food is called photosynthesis.”可知，光合作用是植物制造食物的方式。故选C。 2．细节理解题。根据“Many places get colder in autumn with shorter days and longer nights. Trees get less sunlight, so photosynthesis slows down.”可知，秋天阳光减少导致树叶停止制造绿色化学物质。故选B。 3．词句猜测题。根据“Once it gets cold enough and ice appears at night, the trees drop their leaves.”可知，树掉树叶是为了让自己安全。划线的“They”指代的是前文提到的“trees”。故选A。 4．篇章结构题。通读全文可知，第一段引出话题，第二至第六段分别介绍树叶是如何变色的。故篇章结构为总分结构，即结构为①/②③④⑤⑥。故选B。 5．最佳标题题。文章主要讲述了树叶在不同季节的颜色变化及其原因，特别是光合作用在其中的作用。选项C“树叶的颜色”最适合当标题。故选C。 2 / 2 学科网（北京）股份有限公司 $$ Lesson1 Why are plants important 一、英汉互译 ① be made from ___________ ② play a part in ______________ ③ 带走 ____________ ④ be important for ______________ ⑤ 居住 ____________ ⑥ clean the air ______________ 2、 单项选择 1．The old man needs someone ________ him ________ the bag. A．to help; carry B．help; carries C．to help; carrying D．help; to carry 2．This pair of trousers_________leather. May I ________? A．is made of; try it on B．are made from; try them on C．is made of; try them on D．are made from; try it on 3．It’s important for us ________ hard in order to have a better life. A．work B．to work C．working D．works 4．It’s important for ________ to keep ________. A．we; health B．us; health C．we; healthy D．us; healthy 5．Will Jill play a part in ___________ the plan for English study？ A．make B．makes C．made D．making 三、补全对话 根据下面的对话情景，在每个空白处填上一个恰当的句子，使对话的意思连贯、完整。 A: Morning, Nick. What are you going to do tomorrow? B: I have no plans yet. 1 ? A: I will go to Beishan Park to plant trees. B: 2 . It’s good for our city environment. A: Yes. The more trees, the fresher the air will be. B: Yeah! 3 ? A: My teacher Ms. Jones and my classmates. 4 ? B: Sure, I’d love to. 5 . A: In our classroom.You must get there before eight. B: OK, see you then. 四、完形填空 Water is very important to living things. Without water there can be no 1 on Earth. All animals and plants need water. 2 also needs water. We need water to drink. to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere. There is water in seas, rivers and 3 . Water is found almost everywhere. Even in the 4 part of the world, there is some water in the air. You cannot see or feel it when it is a part of the 5 . The water in the seas, rivers and lakes is a liquid (液体). The water in the air is a 6 , and we call it water vapor. Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals (结晶体). Snow crystals are very, very small crystals of ice. Ice is frozen water. It is a solid. There can be 7 and ice everywhere in winter. Some people think there’s 8 water on Earth. In fact, there is only enough water for us to use now. If we don’t 9 it, it will surely be used out some day. To protect water is to protect 10 . Do you think so? 1．A．birds B．trees C．fish D．life 2．A．Animals B．Plants C．People D．Food 3．A．air B．lakes C．pools D．bathrooms 4．A．highest B．hottest C．coldest D．driest 5．A．air B．sea C．river D．ice 6．A．light B．gas C．sound D．color 7．A．rain B．storm C．snow D．sunlight 8．A．little B．no C．not much D．much 9．A．drink B．save C．use D．pollute 10．A．friends B．parents C．ourselves D．teachers 五、阅读理解 (A) Space Club     Are the stars calling you? Why not meet with us at the Space Club every Friday night at 6 p.m.? We learn about the stars in a fun way. Are you interested in the universe (宇宙)? Come and join us this Friday evening! For more information, call Leo at 5968-4437 before 2 p.m. this Thursday. Gardening Club     Like getting your hands dirty and watching plants grow? Our Gardening Club meets every Saturday morning at 9 a.m. We’ll show you how to plant in the garden. Get ready to plant your own flowers and vegetables! Come with us this weekend. Find out more at tinyurl.com/TWJ-gardenclub. Story-telling Club     Love telling stories? Join our English Story-telling Club! We meet every Wednesday after school at 3:30 p.m. Tell your stories, listen to others, and be better at telling stories in an interesting way. We play cool games like Story Circle. Let’s build a story together. It’s all about fun! Come and join us this Wednesday. Please call Sam at 235-1143 for more information. 1．What can you do in the Gardening Club? A．Study the stars. B．Play cool games. C．Learn to plant. D．Tell some stories. 2．When should Susan go if she joins the Story-telling Club? A．Every Friday night at 6 p.m. B．Every Saturday morning at 9 a.m. C．Every Thursday afternoon at 2 p.m. D．Every Wednesday afternoon at 3:30 p.m. 3．In which part of a newspaper can we read this text? A．Science study. B．Students’ life. C．Travel stories D．Sports news. (B) Why do the leaves on trees have different colors? What makes them change their colors? Leaves use sunlight, water and air to make food for the trees. This way of making food is called photosynthesis (光合作用). Photosynthesis is important to animals as well as plants. Some animals eat plants. Other animals eat these animals. Summer is playtime. For the leaves of many trees, however, it’s work, work, work! The sun is shining. The leaves are making food for the trees. The trees keep more than enough food deep inside. Leaves are green in summer because they are making food. Leaves also have orange, yellow, or brown colors inside them. During summer, those colors are covered by the green color. Many places get colder in autumn with shorter days and longer nights. Trees get less sunlight, so photosynthesis slows down. Over time, leaves stop making the green chemical (化学物质). The orange, yellow, and brown colors grow when that happens. Once it gets cold enough and ice appears at night, the trees drop their leaves. They do this to keep themselves safe. If the leaves are icy while still on the trees, the trees can be hurt. Trees that drop their leaves are bare (光秃秃) in winter. They use the food they save in summer to get through the cold days and nights. Spring comes before long. Ice and snow disappear and the rains come. The sun shines, and tiny leaves grow from branches. Once again, the leaves use sunlight, water and air to make food. The cycle begins again. 1．What is photosynthesis according to the passage? A．It is a way of growing leaves. B．It is a way of changing colors. C．It is a way to make food for plants. D．It is a way for animals to eat plants. 2．What stops leaves from making the green chemical in autumn? A．Less air in autumn. B．Less sunlight in autumn. C．Less water in autumn. D．Less time in autumn. 3．What does the underlined word “They” in Paragraph 5 refer to? A．The trees. B．The leaves. C．The colors. D．The animals. 4．What would be the best structure of the passage? A．B．C． D． 5．What is the best title of the passage? A．The importance of the sunlight B．The trees in different seasons C．The colors of the tree leaves D．The changes of the four seasons 2 / 2 学科网（北京）股份有限公司 $$