问题

I don’t know _________
A:what to do it
B:how to do it
C:what to do
D:to do what
B:how to do it
C:what to do
D:to do what
正确答案是:
同类题型
What’s your favorite ______ —Hamburger.
Must I return the book tomorrow morning —No, you ________. You can keep it longer.
Unless ______ , we’ll have to shut down some branch companies for lack of money.
,itis______a beautiful country town with a variety 0f cultures
The cousins are alike in age,but ________ they are asdifferent as day and night.