单项选择题

All flights()because of the snowstorm, we decided to take the train.

A. were canceled
B. had been canceled
C. having canceled
D. having been canceled

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单项选择题
They()to enter the building by the back door; however, the back door was locked.

A. weren’t supposed
B. wouldn’t be supposed
C. were supposed
D. would be supposed
单项选择题
35().

A.attraction
B.highlight
C.concentration
D.publicity
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