Unit5 Animal friends单元语法填空专项训练100题-2025-2026学年冀教版七年级上册英语

冀教版七年级上册英语 Unit5 Animal friends单元语法填空专项训练 请根据括号里单词的正确形式填空。 1. My aunt is on a ______ (business) trip, so I'm looking after her pet dog. 1. It's a ______ (pity) that we can't go to the zoo today because of the bad weather. 1. Dogs are very ______ (friend) to people. They can be good pets. 1. The rhino and the egret are a good ______ (team). They help each other. 1. We should take care of each ______ (other) when we are in the wild. 1. Please ______ (stay) here until I come back. I have something important to tell you. 1. The strange ______ (sound) scared the little girl. She cried loudly. 1. It's ______ (danger) to get close to the wild animals. 1. There are many interesting ______ (thing) to see in the zoo. 1. The sudden noise ______ (scare) the birds away just now. 1. We often ______ (feed) the birds in the park with some breadcrumbs. 1. Giraffes have long necks and they like to eat ______ (leaf). 1. Pandas mainly live on ______ (bamboo). It's their favorite food. 1. I'd like to have a pet cat because they are so ______ (love). 1. Instead of ______ (play) games, we should do something more meaningful. 1. My cousin has a pet dog and he often plays with ______ (it). 1. The bear looks very ______ (fat) because it has eaten a lot before winter. 1. The ______ (hairy) dog is very cute. Its fur feels soft. 1. Most of the students in our class ______ (like) animals very much. 1. Monkeys are good at ______ (climb) trees. They are very active. 1. The ______ (grey) rabbit is running quickly in the grass. 1. A ______ (group) of students are going to visit the zoo tomorrow. 1. The leaves of this plant ______ (usual) turn yellow in autumn. 1. When I saw the little cat, I couldn't help ______ (pick) it up. 1. My sister wants to have a pet hamster because she thinks they are so ______ (fun). 1. Dinosaurs died out millions of years ago. We can only learn about them from ______ (report). 1. We should try our best to protect the animals in ______ (dangerous). 1. I'm looking forward to ______ (see) the pandas when I visit the zoo next time. 1. The ______ (friendly) between humans and animals is very important. 1. Each animal has ______ (it) own way of living. 1. Don't ______ (scares) the animals in the zoo. It's not allowed. 1. The insect has six legs and two pairs of ______ (wing). 1. I bought some ______ (cheese) and ______ (butter) in the supermarket yesterday. 1. The keeper ______ (feeded) the lions with some meat just now. 1. There is a sign which says "No ______ (feed)" near the animal cages. 1. The ______ (giraffes') long necks help them reach the leaves on tall trees. 1. We can use carrots to feed the rabbits instead of ______ (give) them grass. 1. My little brother is always ______ (funny) than me. He can tell many jokes. 1. Some dinosaurs were very ______ (huge), much bigger than the elephants today. 1. It's our duty to make a ______ (report) about how to protect animals. 1. The ______ (hairy) on the dog's back is very thick. 1. Most animals like to stay in ______ (group) for safety. 1. The leaves on the tree are falling down one by ______ (one). 1. I'd like ______ (have) a pet bird because I like listening to its songs. 1. Dogs are ______ (loyal) than any other animal to their owners. 1. The rhino's ______ (skin) is very thick, which can protect it from many dangers. 1. When we are in the forest, we should be careful not to make any loud ______ (sound). 1. The ______ (nearby) forest is a good place for animals to live in. 1. We should not do anything to ______ (scared) the animals in their natural habitats. 1. Look! There are some ______ (insects) flying around the flowers. 1. My mother bought a lot of ______ (cheeses) of different kinds. 1. Butter is made from ______ (milk). Do you know that? 1. We need to ______ (feeds) the baby birds every few hours. 1. There are many ______ (giraffe) in this zoo. They are very popular among visitors. 1. Pandas are very ______ (cute), and many people like them. 1. ______ (instead) of going to the park, we decided to go to the zoo. 1. Carrots are rich in vitamins. Rabbits like to eat ______ (they) very much. 1. That story about animals is so ______ (funny). It makes us laugh a lot. 1. Dinosaurs once ruled the earth, but now they are ______ (die). 1. We should write a detailed ______ (report) on the animals we saw in the zoo. 1. The fat cat is ______ (lie) on the sofa lazily. 1. The ______ (hairy) on the caterpillar looks a bit scary. 1. Most of the students in my class ______ (be) interested in animals. 1. Monkeys are good at ______ (jump) from one tree to another. 1. The grey wolf is looking for food in the ______ (nearby) area. 1. Please don't make any noise. You may ______ (scare) the little animals. 1. There are many kinds of ______ (insect) in the garden, such as butterflies and bees. 1. I bought some cheese and butter, and ______ (they) are very fresh. 1. We often feed the chickens with ______ (corn) and ______ (wheat). 1. The keeper feeds the ______ (giraffe) with fresh leaves every day. 1. The panda is eating ______ (bamboos) slowly. It looks so cute. 1. Instead of watching TV, we can read some books about ______ (animal). 1. My father told me a ______ (funny) story about a talking dog. 1. Scientists are still studying how the ______ (dinosaur) died out. 1. We need to write a ______ (report) about the importance of protecting animals. 1. The ______ (hairy) dog is running after a ball in the yard. 1. Most of the animals in the zoo are very ______ (interest). 1. The little boy is good at ______ (climb) mountains with his father. 1. The grey clouds in the sky ______ (look) like they are going to rain. 1. A group of students are discussing how to protect the ______ (animal) in danger. 1. The leaves on the tree are green in spring and turn yellow in ______ (autumn). 1. We should be ______ (friend) to all the animals and not hurt them. 1. The sound of the thunder ______ (scare) the children last night. 1. My sister likes to play with her pet ______ (rabbit). They are very cute. 1. We can see many ______ (insect) in the grass during summer. 1. The cheese on the plate smells very ______ (good). 1. Butter is often used in making ______ (cake) and cookies. 1. The zookeeper feeds the animals on time every day to keep them ______ (health). 1. The giraffe is stretching its long neck to eat the ______ (leaf) on the high tree. 1. Pandas are very special animals and they live mainly on ______ (bamboo). 1. Instead of ______ (walk) to school, I ride my bike every day. 1. The carrot in the basket is very ______ (fresh). It's good for rabbits. 1. The funny story about the animals makes us ______ (laugh) loudly. 1. Scientists are trying to find out more about the life of the ______ (dinosaur). 1. We should write a ______ (report) to tell people how to protect the environment for animals. 1. The hairy cat is lying on the ______ (sofa) and enjoying the sunshine. 1. Most of the animals in the forest are active at ______ (night). 1. The little boy is climbing the tree carefully, afraid of ______ (fall) down. 1. The grey cat is chasing a mouse in the ______ (nearby) house. 1. A group of ______ (student) are visiting the animal shelter to learn about animal protection. 答案解析 1. business解析：考查固定搭配“on a business trip”（出差），business此处为名词作定语，无需变形，符合单元中“因特殊情况委托照顾宠物”的延伸语境。 2. pity解析：“It's a pity that...”（……真是遗憾）是单元常用句型，pity为名词，此处直接填原形，贴合“无法去动物园”的场景。 3. friendly解析：句中“be+形容词+to sb.”为固定结构，friend的形容词形式为friendly（友好的），“be friendly to people”（对人友好）是单元中描述动物性格的核心表达，符合“狗作为宠物”的主题。 4. team解析：team为可数名词，空前有不定冠词a，故填单数形式。“a good team”（一对好搭档）用于描述犀牛和白鹭的互助关系，是单元中“动物间共生”的重点内容。 5. other解析：考查固定搭配“each other”（互相），“take care of each other”（互相照顾）符合单元中“在野外与动物或同伴相处”的语境，无需变形。 6. stay解析：本句为祈使句，以Please开头，后接动词原形，“stay here”（待在这里）是日常指令表达，与单元中“照顾动物时的临时安排”相呼应。 7. sound解析：sound此处指“特定的声音”，为可数名词，空前有定冠词the表特指，故填单数形式，“the strange sound”（奇怪的声音）符合“吓到小女孩”的场景。 8. dangerous解析：“It's+形容词+to do sth.”是单元核心句型，danger的形容词形式为dangerous（危险的），“It's dangerous to get close to wild animals”（靠近野生动物很危险）是单元中“动物安全”的重点提示。 9. things解析：thing为可数名词，空前有many（许多）修饰，需用复数形式things，“many interesting things”（许多有趣的东西）符合“动物园观光”的主题。 10. scared解析：句中“just now”（刚才）提示时态为一般过去时，scare的过去式为scared，“scare the birds away”（把鸟吓跑）是单元中“声音对动物影响”的场景表达。 11. feed解析：句中“often”（经常）提示时态为一般现在时，主语we是第一人称复数，谓语动词用原形，“feed the birds”（喂鸟）是单元中“与动物互动”的常用动作。 12. leaves解析：leaf（树叶）为可数名词，长颈鹿吃的树叶不止一片，需用复数形式leaves（变f为v加es），符合单元中“动物饮食习惯”的内容。 13. bamboo解析：bamboo表示“竹子”（泛指竹子这种植物或竹子材料）时为不可数名词，“live on bamboo”（以竹子为食）是单元中描述熊猫习性的核心知识点，故填原形。 14. lovely解析：句中“be+形容词”结构需填形容词，love的形容词形式为lovely（可爱的），“so lovely”（如此可爱）用于描述猫的外形，符合单元中“宠物特征”的主题。 15. playing解析：instead of后接动词-ing形式，play的-ing形式为playing，“instead of playing games”（而不是玩游戏）是单元中“优先做有意义的事（如照顾动物）”的延伸表达。 16. it解析：此处代指前文提到的“a pet dog”，作介词with的宾语，用人称代词宾格it，符合单元中“指代宠物”的语法场景。 17. fat解析：句中“look+形容词”结构需填形容词，fat（胖的）直接作表语，“looks very fat”（看起来很胖）用于描述熊冬眠前的体态，符合单元中“动物季节习性”的内容。 18. hairy解析：此处需形容词修饰名词dog，hairy（毛茸茸的）直接作定语，“the hairy dog”（毛茸茸的狗）是单元中“动物外形特征”的常见描述。 19. like解析：句中“most of the students”（大多数学生）为复数主语，时态为一般现在时，谓语动词用原形like，“like animals very much”（非常喜欢动物）符合单元中“人与动物关系”的主题。 20. climbing解析：“be good at doing sth.”（擅长做某事）是单元核心句型，at后接动词-ing形式，climb的-ing形式为climbing，“good at climbing trees”（擅长爬树）是单元中描述猴子习性的重点内容。 21. grey解析：此处需形容词修饰名词rabbit，grey（灰色的）直接作定语，“the grey rabbit”（灰色的兔子）是单元中“动物颜色特征”的描述，符合主题。 22. group解析：考查固定搭配“a group of”（一群），group为可数名词，空前有不定冠词a，故填单数形式，“a group of students”（一群学生）符合“集体参观动物园”的场景。 23. usually解析：此处需副词修饰动词turn，usual的副词形式为usually（通常），“usually turn yellow”（通常变黄）用于描述植物季节变化，与单元中“动物生存环境（植物）”相呼应。 24. picking解析：考查固定搭配“couldn't help doing sth.”（忍不住做某事），help后接动词-ing形式，pick的-ing形式为picking，“couldn't help picking it up”（忍不住把它抱起来）符合“看到小猫时的反应”的场景。 25. funny解析：句中“be+形容词”结构需填形容词，fun的形容词形式为funny（有趣的），“so funny”（如此有趣）用于描述仓鼠的特点，符合单元中“宠物吸引力”的主题。 26. reports解析：report（报告、资料）为可数名词，此处表示“通过各类资料了解恐龙”，需用复数形式reports，符合单元中“动物知识获取途径”的延伸语境。 27. danger解析：考查固定搭配“in danger”（处于危险中），dangerous的名词形式为danger，“protect the animals in danger”（保护濒危动物）是单元中“动物保护”的核心内容。 28. seeing解析：“look forward to doing sth.”（期待做某事）是单元常用句型，to后接动词-ing形式，see的-ing形式为seeing，“looking forward to seeing the pandas”（期待看熊猫）符合“动物园参观期待”的场景。 29. friendship解析：此处需名词作主语，friendly的名词形式为friendship（友谊），“the friendship between humans and animals”（人与动物之间的友谊）是单元核心主题，故填friendship。 30. its解析：此处需形容词性物主代词修饰名词way，it的形容词性物主代词为its（它的），“its own way of living”（它自己的生活方式）用于描述动物习性，符合单元内容。 31. scare解析：本句为祈使句否定形式“Don't+动词原形”，scares为第三人称单数形式，需还原为原形scare，“Don't scare the animals”（不要吓唬动物）是单元中“动物园礼仪”的重点提示。 32. wings解析：wing（翅膀）为可数名词，空前有two pairs of（两对）修饰，需用复数形式wings，“two pairs of wings”（两对翅膀）是单元中“昆虫身体特征”的核心描述。 33. cheese; butter解析：cheese（奶酪）和butter（黄油）均为不可数名词，无复数形式，直接填原形，此处用于“超市购物”场景，与单元中“宠物食物（如奶酪喂小动物）”相呼应。 34. fed解析：句中“just now”（刚才）提示时态为一般过去时，feed的过去式为fed（不规则变化，非feeded），“fed the lions”（喂狮子）是单元中“动物园饲养员工作”的内容，需注意动词过去式的正确形式。 35. feeding解析：“No+动词-ing形式”表示“禁止做某事”，是单元中“动物园标识”的常见表达，feed的-ing形式为feeding，“No feeding”（禁止投喂）符合“动物安全管理”的主题。 36. giraffes'解析：此处需名词所有格修饰名词necks，giraffe的复数形式为giraffes，其所有格为giraffes'（以s结尾的复数名词变所有格加'），“giraffes' long necks”（长颈鹿的长脖子）是单元中“动物身体特征”的描述，需注意所有格的正确形式。 37. giving解析：instead of后接动词-ing形式，give的-ing形式为giving，“instead of giving them grass”（而不是给它们草）是单元中“动物喂食选择”的场景，符合“用胡萝卜喂兔子”的常识。 38. funnier解析：句中“than”（比）提示用形容词比较级，funny的比较级为funnier（变y为i加er），“funnier than me”（比我有趣）用于比较兄弟性格，与单元中“动物与人类性格对比”的延伸语境相呼应。 39. huge解析：句中“be+形容词”结构需填形容词，huge（巨大的）直接作表语，“very huge”（非常巨大）用于描述恐龙体型，符合单元中“远古动物特征”的内容。 40. report解析：report（报告）为可数名词，空前有不定冠词a，故填单数形式，“make a report”（做报告）是单元中“动物保护任务”的常见表达，符合主题。 41. hair解析：此处需名词作主语，hairy的名词形式为hair（毛发，不可数），“the hair on the dog's back”（狗背上的毛）是单元中“动物外形细节”的描述，需注意hairy与hair的词性转换。 42. groups解析：group（群体）为可数名词，此处表示“动物为安全而群居”，需用复数形式groups，“stay in groups”（群居）是单元中“动物生活习性”的核心内容。 43. one解析：考查固定搭配“one by one”（一个接一个地），无需变形，“fall down one by one”（一片接一片落下）用于描述树叶掉落，与单元中“动物生存环境（植物）”相呼应。 44. to have解析：“would like to do sth.”（想要做某事）是单元核心句型，to后接动词原形，“would like to have a pet bird”（想要养一只宠物鸟）符合单元中“养宠物”的主题。 45. more loyal解析：句中“than”（比）提示用形容词比较级，loyal（忠诚的）为多音节词，其比较级为more loyal，“more loyal than any other animal”（比其他任何动物都忠诚）是单元中“狗的性格优势”的重点描述。 46. skin解析：skin（皮肤）此处指犀牛的皮肤，为不可数名词，直接填原形，“the rhino's skin”（犀牛的皮肤）是单元中“动物身体保护特征”的内容，符合主题。 47. sounds解析：sound（声音，泛指多种声音）为可数名词，空前有any（任何）修饰，需用复数形式sounds，“make any loud sounds”（制造任何大声的噪音）是单元中“野外避免惊扰动物”的提示。 48. nearby解析：nearby（附近的）可直接作形容词修饰名词forest，“the nearby forest”（附近的森林）是单元中“动物栖息地”的常见描述，无需变形。 49. scare解析：此处需动词原形构成不定式“to do sth.”，scared为过去式或过去分词，需还原为原形scare，“do anything to scare the animals”（做任何吓唬动物的事）符合单元中“保护动物自然习性”的主题。 50. insects解析：insect（昆虫）为可数名词，空前有some（一些）修饰，需用复数形式insects，“some insects flying around the flowers”（一些在花周围飞的昆虫）是单元中“动物与植物关系”的场景。 51. cheese解析：cheese（奶酪）为不可数名词，无复数形式，“a lot of cheese”（很多奶酪）用于描述“购买不同种类奶酪”，需注意不可数名词的用法，符合单元中“宠物食物”的延伸语境。 52. milk解析：milk（牛奶）为不可数名词，直接填原形，“butter is made from milk”（黄油由牛奶制成）是常识性内容，与单元中“动物相关食物”相呼应。 53. feed解析：情态动词need to后接动词原形，feeds为第三人称单数形式，需还原为原形feed，“need to feed the baby birds”（需要喂幼鸟）是单元中“照顾小动物”的重点内容。 54. giraffes解析：giraffe（长颈鹿）为可数名词，空前有many（许多）修饰，需用复数形式giraffes，“many giraffes in this zoo”（这个动物园里的许多长颈鹿）符合“动物园动物数量”的描述。 55. cute解析：句中“be+形容词”结构需填形容词，cute（可爱的）直接作表语，“very cute”（非常可爱）是单元中描述熊猫外形的核心表达，符合主题。 56. Instead解析：考查固定搭配“instead of”（而不是），此处instead位于句首作状语，首字母大写，“Instead of going to the park”（而不是去公园）符合“选择去动物园”的场景，需注意句首大写规则。 57. them解析：此处代指前文提到的“carrots”，作动词eat的宾语，用人称代词宾格them，“like to eat them”（喜欢吃它们）符合单元中“兔子饮食习惯”的内容。 58. funny解析：句中“be+形容词”结构需填形容词，funny（有趣的）直接作表语，“so funny”（如此有趣）用于描述动物故事的特点，符合单元中“动物相关故事”的延伸语境。 59. dead解析：句中“be+形容词”结构需填形容词，die的形容词形式为dead（死亡的），“now they are dead”（现在它们已经灭绝了）是单元中“恐龙现状”的核心描述，需注意die与dead的词性转换。 60. report解析：report（报告）为可数名词，空前有不定冠词a和形容词detailed（详细的）修饰，故填单数形式，“write a detailed report”（写一份详细的报告）是单元中“动物观察任务”的常见表达。 61. lying解析：句中“look!”（看）提示时态为现在进行时，其结构为“be+动词-ing形式”，lie（躺）的-ing形式为lying（不规则变化，非lieing），“is lying on the sofa”（正躺在沙发上）是单元中“宠物休息状态”的描述，需注意动词-ing形式的正确拼写。 62. hair解析：此处需名词作主语，hairy的名词形式为hair（毛发，不可数），“the hair on the caterpillar”（毛毛虫身上的毛）是单元中“昆虫外形特征”的细节描述，符合主题。 63. are解析：句中“most of the students”（大多数学生）为复数主语，时态为一般现在时，be动词用are，“are interested in animals”（对动物感兴趣）是单元中“学生与动物关系”的核心表达。 64. jumping解析：“be good at doing sth.”（擅长做某事）是单元核心句型，at后接动词-ing形式，jump的-ing形式为jumping，“good at jumping from one tree to another”（擅长从一棵树跳到另一棵树）是单元中描述猴子习性的重点内容。 65. nearby解析：nearby（附近的）可直接作形容词修饰名词area，“the nearby area”（附近区域）是单元中“狼的活动范围”的描述，无需变形，符合主题。 66. scare解析：情态动词may后接动词原形，“may scare the little animals”（可能会吓到小动物）是单元中“避免噪音惊扰动物”的提示，符合“保持安静”的场景。 67. insects解析：insect（昆虫）为可数名词，空前有“many kinds of”（多种）修饰，需用复数形式insects，“many kinds of insects”（多种昆虫）是单元中“花园里的动物”的描述，符合主题。 68. they解析：此处代指前文提到的“cheese and butter”，作句子主语，用人称代词主格they，“they are very fresh”（它们很新鲜）符合“描述购买的食物”的场景，需注意主格的用法。 69. corn; wheat解析：corn（玉米）和wheat（小麦）均为不可数名词，无复数形式，直接填原形，“feed the chickens with corn and wheat”（用玉米和小麦喂鸡）是单元中“家禽饮食习惯”的内容，符合主题。 70. giraffes解析：giraffe（长颈鹿）为可数名词，此处表示“饲养员喂长颈鹿”，通常指多只，需用复数形式giraffes，“feeds the giraffes”（喂长颈鹿）是单元中“动物园饲养工作”的常见表达。 71. bamboo解析：bamboo表示“竹子”（泛指）时为不可数名词，“eating bamboo”（吃竹子）是单元中描述熊猫饮食习惯的核心内容，故填原形，需注意不可数名词的用法。 72. animals解析：animal（动物）为可数名词，此处表示“关于动物的书籍”，需用复数形式animals，“books about animals”（关于动物的书）是单元中“动物知识获取途径”的延伸表达。 73. funny解析：此处需形容词修饰名词story，funny（有趣的）直接作定语，“a funny story”（一个有趣的故事）是单元中“动物相关故事”的描述，符合主题。 74. dinosaurs解析：dinosaur（恐龙）为可数名词，此处表示“恐龙这类动物”，需用复数形式dinosaurs，“how the dinosaurs died out”（恐龙如何灭绝）是单元中“远古动物研究”的核心内容。 75. report解析：report（报告）为可数名词，空前有不定冠词a修饰，故填单数形式，“write a report”（写一份报告）是单元中“动物保护宣传任务”的常见表达，符合主题。 76. hairy解析：此处需形容词修饰名词dog，hairy（毛茸茸的）直接作定语，“the hairy dog”（毛茸茸的狗）是单元中“动物外形特征”的描述，“running after a ball”（追球）符合“宠物活动”的场景。 77. interesting解析：句中“be+形容词”结构需填形容词，interest的形容词形式有interesting（令人感兴趣的，修饰事物）和interested（感兴趣的，修饰人），此处修饰“animals”（事物），故填interesting，“very interesting”（非常有趣）符合“描述动物园动物”的主题。 78. climbing解析：“be good at doing sth.”（擅长做某事）是单元核心句型，at后接动词-ing形式，climb的-ing形式为climbing，“good at climbing mountains”（擅长爬山）是单元中“人与户外活动”的延伸语境，与“动物栖息地（山区）”相呼应。 79. look解析：句中“the grey clouds”（灰色的云）为复数主语，时态为一般现在时，谓语动词用原形look，“look like they are going to rain”（看起来要下雨了）是单元中“动物生存环境（天气）”的描述，符合主题。 80. animals解析：animal（动物）为可数名词，此处表示“濒危的动物”，需用复数形式animals，“the animals in danger”（濒危动物）是单元中“动物保护”的核心短语，符合主题。 81. autumn解析：autumn（秋天）为不可数名词，直接填原形，“turn yellow in autumn”（在秋天变黄）是单元中“植物季节变化”的描述，与“动物栖息地（植物）”相呼应。 82. friendly解析：句中“be+形容词+to sb.”为固定结构，friend的形容词形式为friendly（友好的），“be friendly to all the animals”（对所有动物友好）是单元中“人与动物和谐相处”的核心主题。 83. scared解析：句中“last night”（昨晚）提示时态为一般过去时，scare的过去式为scared，“the sound of the thunder scared the children”（雷声吓到了孩子们）是单元中“声音对生物影响”的延伸场景。 84. rabbits解析：rabbit（兔子）为可数名词，此处表示“她的宠物兔子”，结合语境“they are very cute”（它们很可爱）可知是多只，需用复数形式rabbits，符合单元中“宠物饲养”的主题。 85. insects解析：insect（昆虫）为可数名词，空前有many（许多）修饰，需用复数形式insects，“many insects in the grass”（草地上的许多昆虫）是单元中“夏季动物活动”的描述，符合主题。 86. good解析：句中“smell+形容词”结构需填形容词，good（好的）直接作表语，“smells very good”（闻起来很香）用于描述奶酪的气味，与单元中“宠物食物（奶酪）”相呼应。 87. cakes解析：cake（蛋糕）为可数名词，此处表示“制作蛋糕”，通常指多种或多个，需用复数形式cakes，“making cakes and cookies”（制作蛋糕和饼干）是单元中“动物相关食物（黄油用途）”的延伸场景。 88. healthy解析：“keep+宾语+形容词”为固定结构，health的形容词形式为healthy（健康的），“keep them healthy”（保持它们健康）是单元中“动物园动物养护”的核心内容，符合主题。 89. leaves解析：leaf（树叶）为可数名词，长颈鹿吃的树叶不止一片，需用复数形式leaves（变f为v加es），“the leaves on the high tree”（高树上的树叶）是单元中“长颈鹿饮食习惯”的重点描述。 90. bamboo解析：bamboo表示“竹子”（泛指）时为不可数名词，“live mainly on bamboo”（主要以竹子为食）是单元中描述熊猫习性的核心知识点，故填原形，需注意不可数名词的用法。 91. walking解析：instead of后接动词-ing形式，walk的-ing形式为walking，“instead of walking to school”（而不是步行上学）是单元中“日常出行方式”的延伸语境，与“动物活动（行走）”相呼应。 92. fresh解析：句中“be+形容词”结构需填形容词，fresh（新鲜的）直接作表语，“very fresh”（非常新鲜）用于描述胡萝卜的状态，“good for rabbits”（对兔子有益）符合单元中“兔子饮食习惯”的内容。 93. laugh解析：考查固定搭配“make sb. do sth.”（使某人做某事），make后接动词原形，“make us laugh loudly”（让我们大声笑）是单元中“动物故事的影响”的延伸表达，符合主题。 94. dinosaurs解析：dinosaur（恐龙）为可数名词，此处表示“恐龙的生活”，需用复数形式dinosaurs，“the life of the dinosaurs”（恐龙的生活）是单元中“远古动物研究”的核心内容，符合主题。 95. report解析：report（报告）为可数名词，空前有不定冠词a修饰，故填单数形式，“write a report to tell people...”（写一份报告告诉人们……）是单元中“动物保护宣传”的常见表达，符合主题。 96. sofa解析：sofa（沙发）为可数名词，空前有定冠词the表特指，故填单数形式，“lying on the sofa”（躺在沙发上）是单元中“宠物休息场景”的描述，符合主题。 97. night解析：考查固定搭配“at night”（在晚上），night为不可数名词，直接填原形，“active at night”（在晚上活跃）是单元中“夜行性动物习性”的核心描述，符合主题。 98. falling解析：afraid of后接动词-ing形式，fall的-ing形式为falling，“afraid of falling down”（害怕掉下来）是单元中“攀爬时的安全顾虑”的延伸场景，与“动物攀爬（如猴子）”相呼应。 99. nearby解析：nearby（附近的）可直接作形容词修饰名词house，“the nearby house”（附近的房子）是单元中“猫的活动范围”的描述，无需变形，符合“猫追老鼠”的场景。 100. students解析：student（学生）为可数名词，空前有“a group of”（一群）修饰，需用复数形式students，“a group of students”（一群学生）符合“集体参观动物收容所”的场景，与单元中“动物保护教育”的主题相呼应。 学科网（北京）股份有限公司 $$