问题标题:
【MustIcleantheclassroomnow?No,you____.Youcandoitafterschool.A.mustn'tB.can'tC.don't选什么,写出理由!急啊!】
问题描述:

MustIcleantheclassroomnow?No,you____.Youcandoitafterschool.A.mustn'tB.can'tC.don't

选什么,写出理由!急啊!

管明露回答:
  C.don't这里是把后面的haveto省略了.   youdon'thaveto=youneedn't
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