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题目
-Mr Wang ,must I come again on sunday morning to clean the windows?
-No,you ____.I have asked others to do it .
A don't have to B mustn't C can't D shouldn't
但为什麽是选A?请说详细一点.

提问时间:2021-03-13

答案
句型:must i .?
yes,you must
no, you needn't/you don't have to
you needn't=you don't have to
故选A
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