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:0.65 引用次数:263 题号:6673444
This is _______ ruler. That is _______ orange.
A.a; aB.a; anC.an; anD.an; a

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