Lucy’s colour ____ blue because she likes to be the leader, so it ____ red.
#77269
A
can’t be; must be
B
can’t be; mustn’t be
C
should be; must be
D
must be; can’t be
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The doctors are doing all that they _____, but the old man is still not breathing properly.
#62988
A
shall
B
need
C
may
D
can
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
－Must we leave now?－No, we ________. We still have two more hours.
#77765
A
can’t
B
mustn’t
C
needn’t
D
shouldn’t