---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
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Now more and more people are_______ the dangers of drinking and driving.
#78107
A
tired of
B
aware of
C
fond of
D
proud of
Tom’s score on the test is the highest in the class. He _____.
#62444
A
should study last night
B
should have studied last night
C
must have studied last night
D
must study last night