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【题目】---- I’ve had a bad cough recently.

----Me too. I’ve never experienced ______ of air pollution in cities before.

A. an acute problem B. a more acute problem

C. a most acute problem D. the most acute problem

【答案】B

【解析】

试题分析:考查形容词比较级表示最高级概念的用法。句意:在城市中,以前我从来没经历过(比这)更严重的空气污染问题从never , before可以看出原来从来没有比这更严重的,本句中用形容词比较级表达的是最高级的概念,一个的问题,用a,B正确。

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