—I phoned you at 7:00 this morning. But there was no answer.—Well, maybe I _________ morning exercises at that time.
It’s snowing all day, so mybrother ______ stay at home. A.must B.have to C must to D.has to
The two boys are fighting _______ each other.
When will the Greens arrive _______ Nanjing.
My mother arrives late _______ work because of the heavy rain.
I have _______ my room every day.