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— I think English is __________ unimportant subject.
— I don’t think so. It is __________ useful tool when we talk with foreigners.

A.a; an B.an; a C.a; a D.an; an

B

解析试题分析:句意:-我认为英语是一门不重要的学科。-我不这样认为。当我们和外国人交流的时候它是一种有用的工具。本题考查冠词。这两句话中的subject 和tool 都是可数名词,故他们的前面都应该用不定冠词。unimportant 这个单词的第一个发音是元音,故用an;而useful 的第一个发音是辅音,故用a。故选B。
考点:考查冠词。

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