what to do
how to do后面必须接宾语,what to do 不必why这个是规定的，没有为什么，记住就行了
Mr.Zhu looks very busy.We want to help him,but we do not know( ).
Mr.Zhu looks very busy.We want to help him,but we do not know( ).
what to do,how to do,what to do it,why to do
what to do,how to do,what to do it,why to do
英语人气：259 ℃时间：2019-08-21 05:33:55
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