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:31 题号:19167699
I think English is useful, so I learn it for ____________ hour every day.
A.anB.aC./D.the

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