单项选择题

All the flights ______ because of the snowstorm, we had to take the train instead.

A. were canceled
B. had been canceled
C. having canceled
D. having been canceled
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单项选择题
She put an extra blanket over the baby for fear that ______.
A. he catches cold
B. he should catch cold
C. he caught cold
D. he be catching cold
单项选择题
We feel it is high time that the Government ______ something to check the inflation.
A. did
B. do
C. should do
D. would do
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