a

what to do with it .what to do to it.

这样的情况可以选 what to do 和how to do it 所以是A

我觉得A和B都可以啊，怎么区分？初三求教约恰

A

借一下你的贴。谢谢。
帮我一下，连词成句
sister,my,make,mothere,Sundays,dinner,on,often,my,helps(.)
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my,is,dog,when,dinner,her,her,take,home,make,tired,I,and(.)
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是选B的选了A或C这个句子的从句就没有主语了。

语感a

选A.what to do=how to do it.