I really don't know_____.A.what should I do B.what to do C.what does D.what doing

问题描述:

I really don't know_____.A.what should I do B.what to do C.what does D.what doing

B 宾语从句的语法,后面要用陈述语序A排除
不定式作宾语 一种是及物动词后直接跟带to的不定式 另一种是“动词+疑问词 +带to的不定式” 选B