We don not know____it next.Let us go and ask Mr.Li.A.what to do B.to do what C.whether to do D.to do whether
问题描述：
We don not know____it next.Let us go and ask Mr.Li.
A.what to do B.to do what C.whether to do D.to do whether
答
答案是C. whether to do it 做know的宾语。
如果选A的话，句子必须是We don't know what to do with / about it ------- it的前面写上with / about,这样句子就完整了。
答
C 我们不知道接下来是否去做。让我们去问李先生吧。
答
C
要用what to do的话,要再加介词about.
what to do about it