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四、根据课文改编内容,在文中空白处填入1个适当的单词,或用括号内所给单词的正确形式填空。
An ecosystem includes all the living and non-living things in an area. Each ecosystem has a role 1 (play) and helps keep the balance between all its members and the greater environment. The ocean is a very large ecosystem 2 earth. It covers around 71% of the earth's surface and 3 (produce) about 70% of the earth's oxygen. It holds lots of salt water, and the water 4 (rise) to the sky, falls onto the land and then returns to the ocean. Wetlands only cover about 6% of the 5 (earth) land area. They are home to many plants and animals. Plants help get rid of 6 (pollute) and make the water clean. Forests make up nearly a 7 (three) of the earth's land area. Plants there take in carbon dioxide from the air and produce oxygen. People call forests 8 "lungs" of the earth. Each of these ecosystems supports lots of plants 9 animals. They keep the planet 10 (health) and make our world a better place.
1.
6.
An ecosystem includes all the living and non-living things in an area. Each ecosystem has a role 1 (play) and helps keep the balance between all its members and the greater environment. The ocean is a very large ecosystem 2 earth. It covers around 71% of the earth's surface and 3 (produce) about 70% of the earth's oxygen. It holds lots of salt water, and the water 4 (rise) to the sky, falls onto the land and then returns to the ocean. Wetlands only cover about 6% of the 5 (earth) land area. They are home to many plants and animals. Plants help get rid of 6 (pollute) and make the water clean. Forests make up nearly a 7 (three) of the earth's land area. Plants there take in carbon dioxide from the air and produce oxygen. People call forests 8 "lungs" of the earth. Each of these ecosystems supports lots of plants 9 animals. They keep the planet 10 (health) and make our world a better place.
1.
to play
2. on
3. produces
4. rises
5. earth's
6.
pollution
7. third
8. the
9. and
10. healthy
答案
1. to play 2. on 3. produces 4. rises 5. earth's 6. pollution 7. third 8. the 9. and 10. healthy
解析
【分析】
本题考查英语语法与词汇的基础运用，需结合固定搭配、句子结构、词性转换等知识逐一分析每个空：
1. 考查非谓语动词，固定搭配have a role to play中，不定式作定语修饰role；
2. 考查介词搭配，on earth是固定短语，意为“在地球上”；
3. 考查主谓一致，主语it指代the ocean，为第三人称单数，一般现在时谓语用单三形式；
4. 考查并列谓语，句子中rises、falls、returns为并列动作，主语the water是第三人称单数，需用一般现在时单三形式；
5. 考查名词所有格，此处表示“地球的陆地面积”，需用earth的所有格形式；
6. 考查词性转换，get rid of后接名词，需将动词pollute转换为名词；
7. 考查分数表达，“三分之一”的正确结构为a third；
8. 考查定冠词，此处特指“地球的肺”，需用定冠词表特指；
9. 考查并列连词，plants和animals为并列关系，需用and连接；
10. 考查形容词作宾补，keep sth + adj结构中，需用health的形容词形式。
【解析】
1. 固定搭配have a role to play，故填to play；
2. 固定短语on earth，故填on；
3. 主语it为第三人称单数，一般现在时谓语用produces，故填produces；
4. 与falls、returns并列，主语the water为第三人称单数，故填rises；
5. 表示“地球的”，用名词所有格earth's，故填earth's；
6. get rid of后接名词，pollute的名词为pollution，故填pollution；
7. 分数“三分之一”为a third，故填third；
8. 特指“地球的肺”，用定冠词the，故填the；
9. plants和animals为并列关系，用and连接，故填and；
10. keep sth + adj结构，用healthy作宾补，故填healthy。
【答案】
1. to play 2. on 3. produces 4. rises 5. earth's 6. pollution 7. third 8. the 9. and 10. healthy
【知识点】
非谓语动词、词性转换、固定搭配
【点评】
本题为基础语法词汇填空题，围绕课文内容展开，考查的知识点均为英语核心基础内容，难度适中，适合巩固英语基础。
【难度系数】
0.7
本题考查英语语法与词汇的基础运用，需结合固定搭配、句子结构、词性转换等知识逐一分析每个空：
1. 考查非谓语动词，固定搭配have a role to play中，不定式作定语修饰role；
2. 考查介词搭配，on earth是固定短语，意为“在地球上”；
3. 考查主谓一致，主语it指代the ocean，为第三人称单数，一般现在时谓语用单三形式；
4. 考查并列谓语，句子中rises、falls、returns为并列动作，主语the water是第三人称单数，需用一般现在时单三形式；
5. 考查名词所有格，此处表示“地球的陆地面积”，需用earth的所有格形式；
6. 考查词性转换，get rid of后接名词，需将动词pollute转换为名词；
7. 考查分数表达，“三分之一”的正确结构为a third；
8. 考查定冠词，此处特指“地球的肺”，需用定冠词表特指；
9. 考查并列连词，plants和animals为并列关系，需用and连接；
10. 考查形容词作宾补，keep sth + adj结构中，需用health的形容词形式。
【解析】
1. 固定搭配have a role to play，故填to play；
2. 固定短语on earth，故填on；
3. 主语it为第三人称单数，一般现在时谓语用produces，故填produces；
4. 与falls、returns并列，主语the water为第三人称单数，故填rises；
5. 表示“地球的”，用名词所有格earth's，故填earth's；
6. get rid of后接名词，pollute的名词为pollution，故填pollution；
7. 分数“三分之一”为a third，故填third；
8. 特指“地球的肺”，用定冠词the，故填the；
9. plants和animals为并列关系，用and连接，故填and；
10. keep sth + adj结构，用healthy作宾补，故填healthy。
【答案】
1. to play 2. on 3. produces 4. rises 5. earth's 6. pollution 7. third 8. the 9. and 10. healthy
【知识点】
非谓语动词、词性转换、固定搭配
【点评】
本题为基础语法词汇填空题，围绕课文内容展开，考查的知识点均为英语核心基础内容，难度适中，适合巩固英语基础。
【难度系数】
0.7
五、完形填空。(2025·江苏徐州·调研)
On a cold day, I sat in my car and watched the sea. 1, I saw some beached dolphins. It was very 2 for them to be out of water. I knew they needed help.
3 thinking too much, I jumped out of my car and ran to the beach. I first called the police 4 they were far away. It was a life-or-death moment for the dolphins. I didn't know 5 to help them, so I posted a message on the internet. I hoped someone could see it and come to 6 those lovely animals.
Minutes later, three teenagers from a nearby school came first. It was like light that drove the darkness away. Then more and more people 7. We decided to save the smaller dolphins first and worked together to move them back to the 8 water successfully.
To my surprise, 9 the smaller dolphins were saved, no one of them swam away. They stayed in the water and made strange sounds to help the other dolphins. After we 10 the rescue work, all the dolphins raised their heads from water and swam around to show their 11 to us. Then, they swam back to the deep sea.
It touched me a lot and made my heart 12. The dolphins had a sense of helping each other when there was 13. I realized that our volunteer group was just like the dolphins. On such a cold day, 14 cared about getting wet or dirty. We tried our best to save the dolphins and made sure everyone was safe. People can 15 our friends—animals. I will never forget this experience.
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(
(
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On a cold day, I sat in my car and watched the sea. 1, I saw some beached dolphins. It was very 2 for them to be out of water. I knew they needed help.
3 thinking too much, I jumped out of my car and ran to the beach. I first called the police 4 they were far away. It was a life-or-death moment for the dolphins. I didn't know 5 to help them, so I posted a message on the internet. I hoped someone could see it and come to 6 those lovely animals.
Minutes later, three teenagers from a nearby school came first. It was like light that drove the darkness away. Then more and more people 7. We decided to save the smaller dolphins first and worked together to move them back to the 8 water successfully.
To my surprise, 9 the smaller dolphins were saved, no one of them swam away. They stayed in the water and made strange sounds to help the other dolphins. After we 10 the rescue work, all the dolphins raised their heads from water and swam around to show their 11 to us. Then, they swam back to the deep sea.
It touched me a lot and made my heart 12. The dolphins had a sense of helping each other when there was 13. I realized that our volunteer group was just like the dolphins. On such a cold day, 14 cared about getting wet or dirty. We tried our best to save the dolphins and made sure everyone was safe. People can 15 our friends—animals. I will never forget this experience.
(
A
)1. A. Suddenly B. Luckily C. Happily D. Excitedly(
C
)2. A. amazing B. important C. dangerous D. necessary(
B
)3. A. With B. Without C. By D. On(
B
)4. A. and B. but C. so D. because(
C
)5. A. where B. which C. how D. when(
A
)6. A. save B. watch C. enjoy D. find(
D
)7. A. changed B. moved C. left D. arrived(
D
)8. A. dirtier B. quieter C. cleaner D. deeper(
C
)9. A. before B. whenever C. after D. until(
A
)10. A. finished B. started C. closed D. tried(
B
)11. A. fins B. thanks C. fears D. worries(
D
)12. A. broken B. cold C. hurt D. warm(
C
)13. A. change B. direction C. trouble D. interest(
B
)14. A. anybody B. nobody C. somebody D. everybody(
A
)15. A. learn from B. live on C. disagree with D. worry about答案
1. A 【点拨】根据语境可知，此处描述一个意外的发现，强调动作发生的突发性。故选A。
2. C 【点拨】根据“I knew they needed help.”以及常识可知，海豚搁浅脱离水环境会危及生命，这是极其危险的。故选C。
3. B 【点拨】without thinking 不假思索地，描述作者没有任何犹豫就立即行动。故选B。
4. B 【点拨】根据语境可知，前后句发生了转折。故选B。
5. C 【点拨】动词“know”后缺少方式状语，询问帮助的方法。故选C。
6. A 【点拨】根据文章内容可知，全文核心事件是救援搁浅海豚，且前文强调“它们需要帮助”，因此“拯救”是直接目的。故选A。
7. D 【点拨】根据语境可知，越来越多的人“到达”这里，参与救援。故选D。
8. D 【点拨】根据常识及救援目标可知，将搁浅海豚移回“深水”才能确保其安全。故选D。
9. C 【点拨】根据语境可知，在小海豚获救后，它们中没有一只游走，它们留下来去帮助其他的海豚。故选C。
10. A 【点拨】根据语境可知，在我们完成救援任务后，所有的海豚向我们表达谢意。故选A。
11. B 【点拨】根据常理可判断，海豚被救后可能以某种方式表达“感谢”。故选B。
12. D 【点拨】根据上文可知，作者被海豚的行为深深触动，心里会产生“温暖”的感觉。故选D。
13. C 【点拨】根据“had a sense of helping each other”可知，海豚在陷入困境时有互相帮助的意识。故选C。
14. B 【点拨】根据“We tried our best to save the dolphins and made sure everyone was safe.”可知，每个人都在尽力去帮助海豚，没有人会在意自己会不会弄湿或弄脏。故选B。
15. A 【点拨】根据语境可知，作者从海豚身上学习到遇到问题，大家要相互帮助的道理。故选A。
2. C 【点拨】根据“I knew they needed help.”以及常识可知，海豚搁浅脱离水环境会危及生命，这是极其危险的。故选C。
3. B 【点拨】without thinking 不假思索地，描述作者没有任何犹豫就立即行动。故选B。
4. B 【点拨】根据语境可知，前后句发生了转折。故选B。
5. C 【点拨】动词“know”后缺少方式状语，询问帮助的方法。故选C。
6. A 【点拨】根据文章内容可知，全文核心事件是救援搁浅海豚，且前文强调“它们需要帮助”，因此“拯救”是直接目的。故选A。
7. D 【点拨】根据语境可知，越来越多的人“到达”这里，参与救援。故选D。
8. D 【点拨】根据常识及救援目标可知，将搁浅海豚移回“深水”才能确保其安全。故选D。
9. C 【点拨】根据语境可知，在小海豚获救后，它们中没有一只游走，它们留下来去帮助其他的海豚。故选C。
10. A 【点拨】根据语境可知，在我们完成救援任务后，所有的海豚向我们表达谢意。故选A。
11. B 【点拨】根据常理可判断，海豚被救后可能以某种方式表达“感谢”。故选B。
12. D 【点拨】根据上文可知，作者被海豚的行为深深触动，心里会产生“温暖”的感觉。故选D。
13. C 【点拨】根据“had a sense of helping each other”可知，海豚在陷入困境时有互相帮助的意识。故选C。
14. B 【点拨】根据“We tried our best to save the dolphins and made sure everyone was safe.”可知，每个人都在尽力去帮助海豚，没有人会在意自己会不会弄湿或弄脏。故选B。
15. A 【点拨】根据语境可知，作者从海豚身上学习到遇到问题，大家要相互帮助的道理。故选A。
解析
【分析】做完形填空时，需先通读全文把握文章主旨（本文讲述作者救援搁浅海豚的经历），再逐题分析：结合上下文语境、逻辑关系、固定搭配及常识，逐一排除错误选项，选出最符合文意的答案。例如第1空描述意外发现海豚，需选表突发性的词；第2空结合海豚生存常识，判断离水的危险性，以此类推，每空都要紧扣语境和逻辑进行选择。
【解析】1. 选A，根据语境，此处描述意外发现海豚，Suddenly（突然）符合动作发生的突发性；2. 选C，结合常识，海豚脱离水环境会危及生命，dangerous（危险的）符合；3. 选B，without thinking是固定搭配，意为“不假思索地”，体现作者立即行动；4. 选B，前后句存在转折关系，叫了警察但他们距离远，故用but；5. 选C，此处询问帮助的方式，how（如何）符合语境；6. 选A，全文核心是救援海豚，save（拯救）是直接目的；7. 选D，越来越多的人到达现场参与救援，arrived（到达）符合；8. 选D，根据救援常识，需将海豚移回深水才能确保安全，deeper（更深的）符合；9. 选C，此处指小海豚被救后，after（在……之后）符合时间逻辑；10. 选A，完成救援任务后，finished（完成）符合；11. 选B，海豚被救后向人类表达感谢，thanks（感谢）符合常理；12. 选D，作者被海豚的互助行为触动，内心感到温暖，warm（温暖的）符合；13. 选C，海豚在陷入困境时互相帮助，trouble（困境）符合；14. 选B，救援时没人在意自己弄湿或弄脏，nobody（没人）符合；15. 选A，作者从动物朋友身上学习互助的道理，learn from（向……学习）符合。
【答案】1.A 2.C 3.B 4.B 5.C 6.A 7.D 8.D 9.C 10.A 11.B 12.D 13.C 14.B 15.A
【知识点】完形填空解题技巧、语境理解、词汇辨析
【点评】本文为记叙文，通过讲述救援搁浅海豚的经历传递互助主题，考查学生对语境的把握和词汇运用能力，是典型的初中英语完形填空题型，难度适中。
【难度系数】0.6
【解析】1. 选A，根据语境，此处描述意外发现海豚，Suddenly（突然）符合动作发生的突发性；2. 选C，结合常识，海豚脱离水环境会危及生命，dangerous（危险的）符合；3. 选B，without thinking是固定搭配，意为“不假思索地”，体现作者立即行动；4. 选B，前后句存在转折关系，叫了警察但他们距离远，故用but；5. 选C，此处询问帮助的方式，how（如何）符合语境；6. 选A，全文核心是救援海豚，save（拯救）是直接目的；7. 选D，越来越多的人到达现场参与救援，arrived（到达）符合；8. 选D，根据救援常识，需将海豚移回深水才能确保安全，deeper（更深的）符合；9. 选C，此处指小海豚被救后，after（在……之后）符合时间逻辑；10. 选A，完成救援任务后，finished（完成）符合；11. 选B，海豚被救后向人类表达感谢，thanks（感谢）符合常理；12. 选D，作者被海豚的互助行为触动，内心感到温暖，warm（温暖的）符合；13. 选C，海豚在陷入困境时互相帮助，trouble（困境）符合；14. 选B，救援时没人在意自己弄湿或弄脏，nobody（没人）符合；15. 选A，作者从动物朋友身上学习互助的道理，learn from（向……学习）符合。
【答案】1.A 2.C 3.B 4.B 5.C 6.A 7.D 8.D 9.C 10.A 11.B 12.D 13.C 14.B 15.A
【知识点】完形填空解题技巧、语境理解、词汇辨析
【点评】本文为记叙文，通过讲述救援搁浅海豚的经历传递互助主题，考查学生对语境的把握和词汇运用能力，是典型的初中英语完形填空题型，难度适中。
【难度系数】0.6
