题目内容
【题目】—What ___________ you doing, John? ( )
—I ___________ listening to music.
A.are; am
B.is; am
C.is; is
【答案】A
【解析】
略
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题目内容
【题目】—What ___________ you doing, John? ( )
—I ___________ listening to music.
A.are; am
B.is; am
C.is; is
【答案】A
【解析】
略