—Is that boy Alan?—No, it ______ be him. He left for Beijing yesterday.
#74514
A
can’t
B
shouldn’t
C
needn’t
D
mustn’t
推荐题目
-----You ______ it up during the meeting------I_______ know it was so sensitive an issue. 
#62907
A
might not have brought ;don’t
B
needn’t have brought;don’t
C
shouldn’t have taken,didn’t
D
shouldn’t have brought ,didn’t
—Must I do my homework now, Mum?—_______. You can do it tomorrow.
#76333
A
No, you needn’t
B
No, you mustn’t
C
Yes, you need
D
Yes, you must