2. 外语
  3. All flights________because of the heavy snow, we had to take the train.

All flights________because of the heavy snow, we had to take the train.

admin2021-09-12  52
问题 All flights________because of the heavy snow, we had to take the train.
选项 A、were cancelled
B、had been cancelled
C、having cancelled
D、having been cancelled
答案D
解析 句意：因为大雪，所有的航班都取消了，我们不得不乘坐火车。根据句子结构，空格处应填非谓语动词，故排除A、B，其逻辑主语为all nights，而句子的主语是we，因此考查独立主格结构，nights与cancel之间为被动关系，故排除C，故选D。
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