-Mr Wang ,must I come again on sunday morning to clean the windows?
问题描述：
-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.
答
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