登录
四、用适当的关系代词填空。
The ecosystem is very important for all living things 20.
The ecosystem is very important for all living things 20.
that
live on the earth. It is the very natural system 21. that
connects every kind of life with the environment closely. There are kind people 22. who/that
take action to protect our earth every day. We have clear rivers 23. that/which
provide fresh water for all living creatures around them. We see green plants 24. that/which
can make the air clean and fresh for us to breathe. There are volunteers 25. who/that
plant more trees in the empty lands every year. We have high mountains 26. that/which
keep the natural environment in a good balance. We also have lovely birds 27. that/which
sing beautiful songs in the green forest. There are hard-working scientists 28. who/that
study ways to protect the ecosystem. We have blue skies 29. that/which
let all the flying animals live freely in the air. Protecting the ecosystem is protecting ourselves, and we must try our best to keep it balanced forever.答案
20.that 21.that 22.who/that 23.that/which 24.that/which 25.who/that 26.that/which 27.that/which 28.who/that 29.that/which
解析
【分析】
要完成定语从句中关系代词的填空，需先判断先行词的属性（指人/物），再结合特殊修饰词（如all、the very）及定语从句中缺的成分（此处均缺主语）选择合适的关系代词：①先行词指人时用who/that；②先行词指物时用that/which；③先行词被all、the very等修饰时，只能用that。逐个分析每个空的先行词即可得出答案。
【解析】
20. 先行词为all living things（指物，且被all修饰），定语从句缺主语，故用that；
21. 先行词为natural system，被the very修饰，定语从句缺主语，故用that；
22. 先行词为kind people（指人），定语从句缺主语，故用who/that；
23. 先行词为clear rivers（指物），定语从句缺主语，故用that/which；
24. 先行词为green plants（指物），定语从句缺主语，故用that/which；
25. 先行词为volunteers（指人），定语从句缺主语，故用who/that；
26. 先行词为high mountains（指物），定语从句缺主语，故用that/which；
27. 先行词为lovely birds（指物），定语从句缺主语，故用that/which；
28. 先行词为scientists（指人），定语从句缺主语，故用who/that；
29. 先行词为blue skies（指物），定语从句缺主语，故用that/which；
【答案】
20.that 21.that 22.who/that 23.that/which 24.that/which 25.who/that 26.that/which 27.that/which 28.who/that 29.that/which
【知识点】
定语从句，关系代词用法
【点评】
本题考查定语从句中关系代词的基础用法，核心是掌握先行词属性及特殊修饰词对关系代词选择的影响，属于英语语法的常考基础题型，难度适中。
【难度系数】
0.6
要完成定语从句中关系代词的填空，需先判断先行词的属性（指人/物），再结合特殊修饰词（如all、the very）及定语从句中缺的成分（此处均缺主语）选择合适的关系代词：①先行词指人时用who/that；②先行词指物时用that/which；③先行词被all、the very等修饰时，只能用that。逐个分析每个空的先行词即可得出答案。
【解析】
20. 先行词为all living things（指物，且被all修饰），定语从句缺主语，故用that；
21. 先行词为natural system，被the very修饰，定语从句缺主语，故用that；
22. 先行词为kind people（指人），定语从句缺主语，故用who/that；
23. 先行词为clear rivers（指物），定语从句缺主语，故用that/which；
24. 先行词为green plants（指物），定语从句缺主语，故用that/which；
25. 先行词为volunteers（指人），定语从句缺主语，故用who/that；
26. 先行词为high mountains（指物），定语从句缺主语，故用that/which；
27. 先行词为lovely birds（指物），定语从句缺主语，故用that/which；
28. 先行词为scientists（指人），定语从句缺主语，故用who/that；
29. 先行词为blue skies（指物），定语从句缺主语，故用that/which；
【答案】
20.that 21.that 22.who/that 23.that/which 24.that/which 25.who/that 26.that/which 27.that/which 28.who/that 29.that/which
【知识点】
定语从句，关系代词用法
【点评】
本题考查定语从句中关系代词的基础用法，核心是掌握先行词属性及特殊修饰词对关系代词选择的影响，属于英语语法的常考基础题型，难度适中。
【难度系数】
0.6
五、语法填空。
How much do you know about wetlands? There are many wetlands in China and some of them 30. (become) important natural reserves already. The Chinese Yellow Sea Wetlands 31. lie in Yancheng, Jiangsu Province are among them. They are home 32. many different kinds of birds and animals. What's more, the world's 33. (large) nature reserve for Milu is also there. The temperature in the wetlands is not too high or too low. Sometimes, it is 34. (rain). There is a lot of rain and sunshine, too. The wetlands are really good places for wildlife.
Offering food and home to some special kinds of animals and birds is not 35. only reason why we should protect wetlands. Wetlands are important 36. they also prevent floods. But some people want to change the wetlands 37. (make) more space for farms and buildings. This leads to fewer and fewer living areas for wildlife.
38. ______ (luck), the government has taken action to protect them. Besides, more and more people are beginning to realise the 39. ______ (important) of wetlands and wildlife. Every year, on February 2nd, the World Wetlands Day, we can join in many activities to tell people more about wetlands around the world.
How much do you know about wetlands? There are many wetlands in China and some of them 30. (become) important natural reserves already. The Chinese Yellow Sea Wetlands 31. lie in Yancheng, Jiangsu Province are among them. They are home 32. many different kinds of birds and animals. What's more, the world's 33. (large) nature reserve for Milu is also there. The temperature in the wetlands is not too high or too low. Sometimes, it is 34. (rain). There is a lot of rain and sunshine, too. The wetlands are really good places for wildlife.
Offering food and home to some special kinds of animals and birds is not 35. only reason why we should protect wetlands. Wetlands are important 36. they also prevent floods. But some people want to change the wetlands 37. (make) more space for farms and buildings. This leads to fewer and fewer living areas for wildlife.
38. ______ (luck), the government has taken action to protect them. Besides, more and more people are beginning to realise the 39. ______ (important) of wetlands and wildlife. Every year, on February 2nd, the World Wetlands Day, we can join in many activities to tell people more about wetlands around the world.
答案
30.have become 31.that/which 32.to 33.largest 34.rainy 35.the 36.because 37.to make 38.Luckily 39.importance
解析
【分析】
本题为语法填空，需结合时态、定语从句、固定搭配、词性转换等语法知识逐一分析：
1. 第30空：时间状语already是现在完成时的标志，主语some of them指代复数湿地，故用have become；
2. 第31空：先行词是The Chinese Yellow Sea Wetlands，定语从句缺主语，用关系代词that/which；
3. 第32空：固定搭配be home to（是……的家园），填介词to；
4. 第33空：the world's表范围，用形容词最高级largest；
5. 第34空：be动词后需形容词，rain变形容词rainy；
6. 第35空：only前加定冠词the，表特指；
7. 第36空：前后因果关系，用because；
8. 第37空：不定式作目的状语，填to make；
9. 第38空：修饰句子用副词，luck变副词Luckily（句首大写）；
10. 第39空：the后接名词，important变名词importance。
【解析】
30. 由时间状语already可知，此处用现在完成时，主语为复数，故填have become；
31. 先行词为物，定语从句缺主语，故填关系代词that/which；
32. 固定搭配be home to表示“是……的家园”，故填介词to；
33. 由the world's（表范围）可知，此处用形容词最高级，故填largest；
34. be动词后需形容词作表语，rain的形容词为rainy，故填rainy；
35. only前需加定冠词the表特指，故填the；
36. 前后句为因果关系，前果后因，故填连词because；
37. 此处用不定式作目的状语，故填to make；
38. 修饰整个句子需用副词，luck的副词形式为Luckily，句首大写，故填Luckily；
39. the后需接名词，important的名词形式为importance，故填importance。
【答案】
30.have become 31.that/which 32.to 33.largest 34.rainy 35.the 36.because 37.to make 38.Luckily 39.importance
【知识点】
现在完成时、定语从句、词性转换
【点评】
本题围绕湿地主题，考察初中阶段核心语法知识，涵盖时态、定语从句、固定搭配、词性转换等基础考点，注重语法在语境中的运用，难度适中，适合巩固语法基础。
【难度系数】
0.6
本题为语法填空，需结合时态、定语从句、固定搭配、词性转换等语法知识逐一分析：
1. 第30空：时间状语already是现在完成时的标志，主语some of them指代复数湿地，故用have become；
2. 第31空：先行词是The Chinese Yellow Sea Wetlands，定语从句缺主语，用关系代词that/which；
3. 第32空：固定搭配be home to（是……的家园），填介词to；
4. 第33空：the world's表范围，用形容词最高级largest；
5. 第34空：be动词后需形容词，rain变形容词rainy；
6. 第35空：only前加定冠词the，表特指；
7. 第36空：前后因果关系，用because；
8. 第37空：不定式作目的状语，填to make；
9. 第38空：修饰句子用副词，luck变副词Luckily（句首大写）；
10. 第39空：the后接名词，important变名词importance。
【解析】
30. 由时间状语already可知，此处用现在完成时，主语为复数，故填have become；
31. 先行词为物，定语从句缺主语，故填关系代词that/which；
32. 固定搭配be home to表示“是……的家园”，故填介词to；
33. 由the world's（表范围）可知，此处用形容词最高级，故填largest；
34. be动词后需形容词作表语，rain的形容词为rainy，故填rainy；
35. only前需加定冠词the表特指，故填the；
36. 前后句为因果关系，前果后因，故填连词because；
37. 此处用不定式作目的状语，故填to make；
38. 修饰整个句子需用副词，luck的副词形式为Luckily，句首大写，故填Luckily；
39. the后需接名词，important的名词形式为importance，故填importance。
【答案】
30.have become 31.that/which 32.to 33.largest 34.rainy 35.the 36.because 37.to make 38.Luckily 39.importance
【知识点】
现在完成时、定语从句、词性转换
【点评】
本题围绕湿地主题，考察初中阶段核心语法知识，涵盖时态、定语从句、固定搭配、词性转换等基础考点，注重语法在语境中的运用，难度适中，适合巩固语法基础。
【难度系数】
0.6
