Air pollution has become than before．We must do something to stop it．( )A．seriousB．more seriousC．most seriousD．the most serious 题目和参考答案——青夏教育精英家教网—

题目内容

4．Air pollution has become_____than before．We must do something to stop it．（　　）

	A．	serious		B．	more serious
	C．	most serious		D．	the most serious

分析空气污染比以前严重了，我们必须做一些事情来阻止它．

解答答案：B
根据句中的than，可知此处需要形容词的比较级．serious严重的（原级）；more serious更严重的（比较级）；most serious最严重的（最高级）；故选B．

点评本题考查的是形容词的比较级，根据句意和一些标志词来确定比较级的使用是解答本题的关键．

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