---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.
#74601
A
can’t
B
mustn’t
C
couldn’t
D
may not
推荐题目
Teachers _______ be sensitive to the development level of each student so as to help them better.
#62795
A
need to
B
may
C
are able to
D
can
It’s annoying ! After I gave her my advice, my daughter ________ go and do the opposite.
#62598
A
have to
B
must
C
shall
D
would
Is there _______________ to sleep for half a day?
#77754
A
somewhere enough silent
B
somewhere silent enough
C
enough silent somewhere
D
anywhere silent enough
House owners keep their gardens in a neat and orderly state according to the regulations.
#63026
A
may
B
would
C
can
D
shall
—Listen ! Helen is singing in the next room.—It _______ be Helen. She has gone to Beijing.
#74851
A
can’t
B
mustn’t
C
may
D
should