— It _______ be Jack who is in the office.— No, it _______ be him. I saw him off at the airport half an hour ago.
#89500
A
can’t ; can’t
B
must; can’t
C
must; mustn’t
D
may; mustn’t
推荐题目
Why didn't you tell me there was no meeting today? I______ all the way here through the heavy snow. 
#89455
A
needn't have driven
B
can't have driven
C
mustn't have driven
D
shouldn't have driven
I was really anxious about you.You ________ home without a word.
#86628
A
mustn't leave
B
shouldn't have left
C
couldn't have left
D
needn't leave
Don''t be worried . The news ____ be true . 
#89748
A
may not
B
mustn''t
C
needn''t
D
shan''t
The boss looked very worried and demanded that the work________before we went home.
#87293
A
wound be finished
B
was finished
C
must be finished
D
be finished