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仁愛(ài)版英語(yǔ)九年級(jí)上冊(cè)u(píng)nit 2 topic 1《population has caused too many problems》(sectiond)練習(xí)題(文件)

 

【正文】 e are several chemical factories pouring waste water into the stream. They may cause . A. air pollution B. water pollution C. noise pollution D. light pollution ( )4. Burning gas, oil and coal air pollution and it can also some illness. A. creates。 causes ( )5. less pollution, the earth will bee and our people’s health will be . A. by。 better C
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