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【题目】—Excuse me. Is this eraser?

—Noit’s _____toy.

A.An ; aB.a ; aC.a ; an

【答案】A

【解析】

句意:——打扰了,这是橡皮擦吗?——不,它是玩具。

考查不定冠词。不定冠词a/an用于单数可数名词前表泛指,a用于以辅音音素开头的名词前,an用于以元音音素开头的名词前; eraser以元音音素开头,不定冠词用antoy以辅音音素开头,不定冠词用a;故选A

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