单项选择题

Most of the students failed in the final exam. It ______ easy.

A. can't be

B. shouldn't be
C. mustn't have been
D. couldn't have been
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单项选择题
Little ______ that the girl has fallen in love with him.
A. he knows
B. he doesn't know
C. does he know
D. doesn't he know
单项选择题
The Olympic Games, ______ in 776 B.C., did not include women players until 1912.
A. first playing
B. to be first played
C. first played
D. to be first playing
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