Ⅱ. Choose the proper sentences from A—G to complete the passage below.
The world is in a dangerous situation now. We must do something to protect the environment. 1.
The greenhouse effect
The atmosphere(大气层) around the Earth is necessary for all living things. It is like the glass of a green house, and it lets sunlight in and keeps heat from getting out. 2. When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide($CO_2$). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result, the Earth's temperature is increasing. This causes sea levels to rise, and in the future may cause cities to disappear.
Cutting down forests
3. This makes the greenhouse effect worse because trees take in $CO_2$ and produce oxygen. Cutting down trees also destroys the homes of the animals that live in the forests, and causes the surface of the soil to be easily destroyed by rain. This can cause floods and even more damage to the environment.
Bad habits
4. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rubbish and pollutes our land and seas.
In order to protect the environment, we need to take proper action. We should become "green consumers". This means that we should buy and use products friendly to the environment. 5. We can reuse things for the same purpose as before, or we can use them for new purposes. If we just learn to live in new and different ways, we can make a difference.
A. Many of our habits cause pollution.
B. We should not use plastic bags, either.
C. However, what are the main problems we face?
D. We should also try to recycle as many things as we can.
E. Trees are important to us and they also help keep soil in place.
F. Every year, we destroy nature by cutting down huge areas of forests.
G. Without it, the Earth would be the same as the Moon, cold and lifeless.

1.C 2.G 3.F 4.A 5.D

【分析】
本题为英语七选五补全短文题，解题思路是先通读全文把握主题（环境保护面临的问题及应对措施），再结合每个空的上下文语境、段落逻辑关系逐一匹配选项：1空需承上启下引出环境问题；2空需承接大气层的作用补充其重要性；3空需契合“砍伐森林”的段落主题；4空需引出“坏习惯”相关内容；5空需衔接前后环保措施，最终匹配正确选项。
【解析】
1. 空1：前文提到要保护环境，后文列举温室效应等环境问题，选项C“However, what are the main problems we face?”起到承上启下的作用，引出下文环境问题，故选C；
2. 空2：前文介绍大气层像温室玻璃，选项G“Without it, the Earth would be the same as the Moon, cold and lifeless.”承接大气层的作用，说明其重要性，故选G；
3. 空3：对应“Cutting down forests”的段落主题，选项F“Every year, we destroy nature by cutting down huge areas of forests.”契合该段主题，故选F；
4. 空4：对应“Bad habits”的段落主题，选项A“Many of our habits cause pollution.”引出该段关于坏习惯的内容，故选A；
5. 空5：前文讲“绿色消费者”，后文讲重复使用物品，选项D“We should also try to recycle as many things as we can.”衔接前后环保措施，故选D。
【答案】
1.C 2.G 3.F 4.A 5.D
【知识点】
英语阅读理解、七选五题型、上下文逻辑衔接
【点评】
本题考查英语七选五题型，侧重考查学生对文章逻辑关系和语境的理解，是初中英语常见基础题型，难度适中。
【难度系数】
0.7