All flights _________ because of the snowstorm,many passengers could do nothing but take the train.
All flights _________ because of the snowstorm,many passengers could do nothing but take the train.
A.had been canceled
B.have been canceled
C.were canceled
D.having been canceled
A.had been canceled
B.have been canceled
C.were canceled
D.having been canceled
英语人气：355 ℃时间：2019-08-19 18:20:06
优质解答
因为句中逗号,逗号前不是一个句子,所以直接排除ABC,选D
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