I really don`t know_____ A.what to do it B.how to do C.what to do D.how I do
问题描述:
I really don`t know_____ A.what to do it B.how to do C.what to do D.how I do
答
C
do在这里是及物动词.所以要有宾语.在这里宾语提前了,是what.
考察的是宾语从句