—Whose book is this? —It _____ be Mary’s. Mo Yan is her favorite author. —No, it ____ be hers, she never brings novels to school.
#75008
A
may; mustn’t
B
can; can’t
C
must; can’t
D
must; mustn’t
推荐题目
— Li Fan won the first prize in the national physics competition. — I ________ he was the winner.
#63178
A
shouldn’t have thought
B
must have thought
C
need have thought
D
could never have thought
—People find it hard to get across the river．—I think at least two bridges over it．
#77307
A
need
B
are needing
C
will need
D
should be needed
—Show me your permit, please.—Oh, it's not in my pocket. It ________.
#62323
A
must have fallen out
B
might fall out
C
could fall out
D
should have fallen out
Today is Wednesday. He _______ be at home. He _____ be at school.
#77250
A
can’t; can
B
can’t; must
C
mustn’t; must
D
mustn’t; can