— 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
—___John come here tonight?—I’m not sure, but he ______ stay at home.
#89007
A
May, might
B
Can, must
C
Must, might
D
Can, might
—Did Jim come?—I don’t know. He _______ while I was out.
#89860
A
might have come
B
might come
C
mush have come
D
should have come
. How ____ you be so careless ? 
#89773
A
can
B
will
C
would
D
may