Ⅱ. 听音,选择单词序号填空。
1. We should ______ the air clean and fresh. A. let B. keep
2. We ______ waste water. A. shouldn’t B. should
3. Everyone ______ water. A. has B. needs
4. Save every ______ of water. A. shop B. drop
5. I am ______ my dress. A. washing B. wash

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

Ⅲ. 听音,判断句子正(√)、误(×)。
() 1. There are a lot of animals.
() 2. She washes her car with too much water.
() 3. We should keep the rivers clean.
() 4. You shouldn’t be too loud.
() 5. Anne is watching TV about animals.

√××√×

Ⅳ. 根据图片,填上对应的选项。
A. green trees B. our earth C. the clean river

1.

2.

3.

1. A
2. C
3. B

1.第一幅图展示的是树木，对应选项A“green trees”。
2. 第二幅图展示的是一条清澈的河流，对应选项C“the clean river”。
3. 第三幅图展示的是地球，且有“世界地球日”字样，对应选项B“our earth”。

Ⅴ. 根据图片完成句子。
1. We should keep the air .
2. A: What are these?
B: They are dead fish on the river.
A: We should keep the rivers .
3. A: What are they doing?
B: They are trees.
4. A: What can you see?
B: I can see much .

1. clean and fresh 2. clean 3. planting 4. rubbish

1. 图片展示的是工厂排放烟雾到空气中的场景，结合句子“We should keep the air...”，可知是保持空气清洁，“keep...+ 形容词”表示使……保持某种状态，所以填“clean and fresh”。
2. 图片中有河上的死鱼，结合对话“We should keep the rivers...”，可知是要保持河流清洁，填“clean”。
3. 图片中人们在种树，“plant trees”表示种树，句子是现在进行时，“plant”的现在分词是“planting”。
4. 图片中有很多垃圾，结合“I can see much...”，“much”修饰不可数名词，“rubbish”是不可数名词，所以填“rubbish”。