此题为判断题(对,错)。
第1题:
This is very important. You_____remember to shut down your computer every
evenlng。
A. ought
B. need
C. must
D. can
第2题:
A、wouldn’t have seen
B、shouldn’t have seen
C、mustn’t have seen
D、can’t have seen
第3题:
第4题:
A.mustn't
B.can't
C.needn't
第5题:
A.Must; needn’t
B.Can; can’t
C.May; mustn’t
D.Can; mustn’t