From what you _____, you can understand why an object weighs less in water than in air.
A、had learnt
B、will learn
C、have learnt
D、can learn
第1题:
A.mustn't
B.can't
C.needn't
第2题:
Must I stay at the office this afternoon? ---No, you ______.
A、don’t
B、needn’t
C、don’t need
D、can’t
第3题:
A、will not
B、may not
C、can't
D、needn't
第4题:
A、wouldn’t have seen
B、shouldn’t have seen
C、mustn’t have seen
D、can’t have seen
第5题:
What's ( )job? Are ( ) British?
A. your, your
B. you, your
C. your, you
第6题:
A.Must; needn’t
B.Can; can’t
C.May; mustn’t
D.Can; mustn’t