Mr.Zhu looks very busy.We want to help him,but we do not know( )._英语解答

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

人气：339 ℃　时间：2019-08-21 05:33:55

解答

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