听录音，选出听到的句子。
（）1. A. Trees help clean the air. B. Trees help cool the air.
C. Trees help clean the water.
（）2. A. They also help cool down the air. B. They also help clean up the air.
C. They also help cool down the Earth.
（）3. A. Trees can give food to animals. B. Trees can give homes to animals.
C. Trees can give homes to people.
（）4. A. It causes global warming. B. It causes global cooling.
C. It causes the temperature to rise.
（）5. A. We need to take photos of them. B. We need to take away from them.
C. We need to take care of them.

1. A 2. A 3. B 4. A 5. C

Read and choose
读一读，选择正确的选项补全对话。
A. They also help cool down the air.
B. It takes away homes from animals.
C. Trees help clean the air.
D. They provide food and shelter for them.
Ms Green: Look at these trees in the school garden. What do you think?
Tom: 1. They make the air fresh.
Lily: 2. When it’s hot, trees make us feel cool.
Jack: And trees are homes to birds and squirrels. 3.
Ms Green: You all know a lot. But sometimes people cut down too many trees.
Tom: That’s bad. 4.
Lily: Yes! We can plant more trees to help.
Ms Green: Great idea! Let’s start today.

1. C 2. A 3. D 4. B

【分析】先通读对话，明确对话围绕树木的作用及砍树的危害展开，再结合每个空的前后语境，匹配选项语义完成补全：1. 空后提到树让空气新鲜，需选与树净化空气相关的选项；2. 空后说热时树让人凉快，需选与树冷却空气相关的选项；3. 空前提到树是动物的家，需选与树为动物提供食物住所相关的选项；4. 前句说砍树不好，需选与砍树危害相关的选项。
【解析】1. 由空后“They make the air fresh.”可知，此处应选体现树净化空气的选项，C项“Trees help clean the air.”符合语境；2. 由空后“When it’s hot, trees make us feel cool.”可知，此处应选体现树冷却空气的选项，A项“They also help cool down the air.”符合语境；3. 由空前“And trees are homes to birds and squirrels.”可知，此处应选体现树为动物提供食物住所的选项，D项“They provide food and shelter for them.”符合语境；4. 由空前“That’s bad.”可知，此处应选体现砍树危害的选项，B项“It takes away homes from animals.”符合语境。
【答案】1.C 2.A 3.D 4.B
【知识点】英语对话补全，语义匹配
【点评】本题为日常话题的对话补全题，贴近生活，主要考查学生对语境的理解能力和选项语义的辨析能力，难度适中。
【难度系数】0.7