仁愛版英語九年級上冊unit 2 topic 1《population has caused too many problems》（sectiona）練習(xí)題(文件)
【正文】 ribly C. well。 sing D. saw。 sing B. see。 SectionA 基礎(chǔ)知識訓(xùn)練 一 . 根據(jù)首字母提示補(bǔ)全單詞。 dance。 dance。 terrible B. well。 into B. pour。 Many years ago, people lived a hard life. They couldn’t use modern machines, because there was 1 one at that time. Today people have a better life but there are new problems. One of biggest problems is it has 2 our rivers and lakes dirty. It kills our fish and affects our 3 water. We call it water pollution. Noise pollution makes us talk more 4 and bee angry 5 . Air pollution is the most serious kind of pollution. It affects all living things in the world. Machines a
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