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求分解及答案:Sorry,I( )to help you at ten.I was busy at the moment

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求分解及答案:Sorry,I( )to help you at ten.I was busy at the moment.
分解及答案:Sorry,I( )to help you at ten.I was busy at the moment.A.won't come B.can't come C.didn't come D.shouldn't come
求分解及答案:Sorry,I( )to help you at ten.I was busy at the moment
答案应该选
C
原因是:
看后面 I was busy at the moment.他用的是过去时,表明在过去的某个时间他没有空,他很忙!所以前面说不能去帮忙也应该是在他 繁忙(没空)的时候才没有去!
如果用wont cant 或shouldnt(这个干脆不考虑)的话表示 将来不能 现在不能 和不可以...和后面的“过去没时间”意思不符!