—He looks very happy. He ____have passed the exam, —I guess so. It’s not difficult after all.
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should
B
could
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must
D
might
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Frightened by the noise in the night, the little girl __________not sleep in her room.
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A
must
B
can
C
should
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dare
I _______ have met him a long time ago. Both his name and face are very familiar.
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may
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can
C
would
D
should
My most devoted friend, Professor Yang, _______ often go hiking when he lived in the mountain that was covered with forest.
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would
B
should
C
could
D
might
With all his money, he _________ worry about a little thing like 5 cents!
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A
can
B
must
C
may
D
should