I really don’t know __________________

试题详情及答案解析

I really don’t know ___________________.

A．What should I do	B．What to do
C．How to do	D．What to do it

答案：B

试题分析：句意：我真的不知道怎么做。Know后面引导的是宾语从句，从句用叙述语序。A应该为What I should do。宾语从句中what做do的宾语。故选B。
考点：考查宾语从句。