新目标英语八年级上册Unit 7 Will people have robots?单元知识点练习（含答案）

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UNIT 7 Will people have robots
知识点1 pollute 用法
1. The _________ (pollute) in our city becomes less than before.
2. Now _________ is very serious. Some rivers and lakes are _________.
A. pollution; pollute B. polluted; pollution
C. pollution; polluted D. pollute; polluted
3. Riding a bike is a goo...