单项选择题

All flights（）because of the heavy snow, we had to take the train.

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

<上一题 目录 下一题>
热门 试题

单项选择题
We were all there when the accident（）.

A.spread
B.broke
C.appeared
D.occurred
单项选择题
We should never run（）the nature.

A.up
B.with
C.for
D.against
相关试题