2. 专升本
  3. All flights______cancelled because of the snowstorm, many passengers could do nothing but take the train.

All flights______cancelled because of the snowstorm, many passengers could do nothing but take the train.

admin2019-05-10  68
问题 All flights______cancelled because of the snowstorm, many passengers could do nothing but take the train.
选项 A、had been
B、have been
C、were
D、having been
答案D
解析
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