题目内容
【题目】--- What ________ you ________? ( )
--- I am reading a book.
A. did, do B. is, doing C. did, doing D. are, doing
【答案】D
【解析】
略
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题目内容
【题目】--- What ________ you ________? ( )
--- I am reading a book.
A. did, do B. is, doing C. did, doing D. are, doing
【答案】D
【解析】
略