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【题目】Have you got ___________electronic reader?

Yes.I think it's __________useful tool.

A.an, anB.an, aC.a, aD.a,an

【答案】B

【解析】

句意:——你有电子阅读器吗?——是的,我认为它是一个有用的工具。

考查不定冠词。a一个,用于辅音音素开头的单词前;an一个,用于元音音素开头的单词前;第一个空后面的electronic是以元音音素开头的单词,所以用an,排除CD,由第二个空后面的useful是以辅音音素开头的单词,所以用a,排除A,故选B

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