问题

The door is open but nobody is in. Mary______have forgotten to lock the door.
A:should
B:must
C:would
D:could;
B:must
C:would
D:could;
正确答案是:
同类题型
My uncle a bird . name is Polly .
Mr. Black________ Shanghai in a few days. Do you know when the earliest plane ________on Sunday
Doctors ______ the fat woman not to eat so much junk food, but she just couldn’t give it up.
My grandfather is as _______as a young man and hates sitting around doing nothing all day.