Mr． Wang， must I come back to clean the classroom again？
No， you_____． I have asked Kate to do it．（ ）
A．mustn'tB．needn'tC．shouldn't
Mr． Wang， must I come back to clean the classroom again？
No， you_____． I have asked Kate to do it．（ ）
A．mustn'tB．needn'tC．shouldn't
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