I dao not know ____it next.A.want to do B.how to do 选什么,为什么?

问题描述:

I dao not know ____it next.A.want to do B.how to do 选什么,为什么?
I dao not know ____it next.
A.want to do B.how to do
选什么,为什么?

B
因为后面有宾语IT,注what to do = how to do it