问题

I’m too tired, so I _____ sit down and rest every five minutes[ ]
A: must
B: must to
C: have
D: have to
B: must to
C: have
D: have to
正确答案是:
同类题型
_________ do you go to the library? —I usually go to the library twice a week. [ ]
. Not until _______ smoking ________ healthy lungs.
My teacher ________ this morning because I was late for class again.
The woman looks very young, but she is ________ 40.[ ]
When I was at the college , I __________ up early to do some body building exercise .