I don't know_______ to help him. A. how should we do B. what we should do C. what should we do

问题描述:

I don't know_______ to help him. A. how should we do B. what we should do C. what should we do

B.有了do就不用how,do后加名词所以用what 又为宾语从句,所以陈述句语序