---Look. The man at the gate _____ be our headmaster. He is always standing there every morning.---No. it ____ be him. He is having a meeting in the office now.
#78230
A
must; can’t
B
must; mustn’t
C
can’t; can’t
D
can’t; mustn’t
推荐题目
Without gravity, we _____ walk on the ground as freely as we do now.
#63085
A
couldn’t
B
mustn’t
C
shan’t
D
needn’t
(2013·四川，5)—Why are your eyes so red？You________have slept well last night.—Yeah，I stayed up late writing a report.
#62494
A
can't
B
mustn't
C
needn't
D
won't
The flowers ________ every day, or they will die.
#76173
A
must water
B
can be watered
C
should water
D
must be watered
—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.
#63413
A
must
B
can
C
need
D
may
Today is Wednesday. He _______be at home. He _______be at school.
#75246
A
can't; can
B
can't; must
C
mustn't; must
D
mustn't; can