2. 外语
  3. All flights ______because of the heavy fog, we had to decide to take the train.

All flights ______because of the heavy fog, we had to decide to take the train.

admin2012-08-10  33
问题 All flights ______because of the heavy fog, we had to decide to take the train.
选项 A、were canceled
B、having canceled
C、having been canceled
D、have been canceled
答案C
解析 所有的航班都因大雾而取消了，所以我们不得不决定乘火车。本题考查分词短语作状语的用法，cancel作vt与主语all flights构成了动宾关系，故用被动语态，取消航班应发生在做决定之前，故用完成时态。
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大学英语四级

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