2. 外语
  3. All the flights _________ because of the snowstorm, we had to take Ihe train instead.

All the flights _________ because of the snowstorm, we had to take Ihe train instead.

admin2010-01-10  34
问题 All the flights _________ because of the snowstorm, we had to take Ihe train instead.
选项 A、were canceled
B、had been canceled
C、having canceled
D、having been canceled
答案D
解析 该句的前半句使用的是独立结构，由于动作发生在过去，所以根据题意要求，使用了完成式被动语态。
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