组卷网 > 高中英语综合库 > 语法 > 词法 > 冠词 > 不定冠词
题型:单项选择 难度:0.65 引用次数:85 题号:21180353
Good teachers have to guarantee         adequate amount of input in English.
A.anB.aC.theD.不填
【知识点】 不定冠词解读

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