2. 外语
  3. 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.

admin2010-02-22  29
问题 All flights______because of the snowstorm, many passengers could do nothing but take the train.
选项 A、had been cancelled
B、were cancelled
C、have been cancelled
D、having been cancelled
答案D
解析
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