– I ran 10 miles last weekend. Can you believe that? – Wow, that ______ easy!
#62638
A
mustn' t be
B
mustn't have been
C
can't have been
D
couldn’t be
推荐题目
It’s Sunday tomorrow, so you _______ get up so early. 
#78216
A
needn’t to
B
need to
C
don’t need to
D
don’t need
---Must I learn the new words in heart today?---No, you _______. You ______ do it tomorrow. 
#74845
A
needn’t; may
B
mustn’t; must
C
mustn’t; may
D
needn’t; mustn’t
 —Can your friend sing?--______.
#74774
A
Yes,I can
B
Yes, he can
C
No,she can
D
No,I can’t