题目内容
— ____ sweep the classroom yesterday?
—I was playing tennis with my friend.
A. Why not B.Why didn't C. Why don't D.Why didn't you
D
解析:
选项B、C错误,因为句子缺主语;选项A错,因为“Why not(+动词原形)”这一结构通常不用于过去(即不与过去时间连用)。
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题目内容
— ____ sweep the classroom yesterday?
—I was playing tennis with my friend.
A. Why not B.Why didn't C. Why don't D.Why didn't you
D
选项B、C错误,因为句子缺主语;选项A错,因为“Why not(+动词原形)”这一结构通常不用于过去(即不与过去时间连用)。