组卷网 > 初中英语综合库 > 语法 > 冠词 > 不定冠词 > a/an的区别
题型:单项选择 难度:0.85 引用次数:26 题号:19022074
You needn’t wear ________ uniform in ________ air-conditioned room.
A.a, anB.a, aC.an, aD./, an

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