—Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.
#74311
A
can’t
B
may not
C
mustn’t
D
needn’t
推荐题目
— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.— Oh, it __________ my younger sister. She was in my room at that moment.
#62876
A
must have been
B
should have been
C
could have been
D
may have been
It ______ be the postman at the door. It’s only six o’clock.
#63562
A
mustn’t
B
can’t
C
won’t
D
needn’t
--- I spent two weeks in London last summer. --- Then you must have visited the British Museum during your stay, _______ you?
#62176
A
mustn’t
B
haven’t
C
didn’t
D
hadn’t
--Life ____ be very hard for people living in the north of Canada as it is very cold there in winter.—Yes, the weather there _____ be as low as 60℃ below zero.
#63305
A
must;can
B
shall;must
C
will;should
D
hasto;can
You _____ have bought the book for me, but thank you all the same.
#62880
A
shouldn’t
B
needn’t
C
can’t
D
mustn’t