情态动词的特殊用法
1. The room is such a terrible mess. It ______ cleaned as the landlady said.
A.mustn’t be
B.mustn’t have been
C.can’t be
D.can’t have been

2. There _______ be an open window somewhere , I can feel cold air coming in.
A.should
B.must
C. seem
D. ought

3. If the doctor had been available, the patient______.
A. could not have died
B. should not have died
C. wouldn’t have died
D. would not die

4. According to western culture , you______ ask a woman her age; it is impolite.
A. needn’t
B.don’t have to
C. mustn’t
D. have not got to

5. She didn’t know you were here; otherwise she ____ to meet you.
A. would have come
B. had come
C. must have come
D. would come

D B C C A