The water is very serious in the lake now.so the government must prevent people from it．( )A．pollution,pollutingB．pollution,to polluteC．pollution,pollutionD．pollute,pollution 题目和参考答案——青夏教育精英家教网—

10．The water is very serious in the lake now，so the government must prevent people from it．（　　）

	A．	pollution；polluting		B．	pollution；to pollute
	C．	pollution；pollution		D．	pollute；pollution

分析水污染已经相当严重了，所以政府必须阻止人们继续污染水源．

解答答案：A，考察动词和名词辨析．在前面一句，缺少主语，所以不应该用动词pollute，而应该用名词pollution来表示"水污染"，所以排除选项D．在后面一句话中，用到了固定短语"prevent sb from doing sth"，译为"阻止某人做某事"，所以应该填写动词ing形式，因此选择A．

点评考察名词或动词的词形变化，应根据上下文及给定的动词或名词形式进行适当变换

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