2. 外语
  3. All flights ____________________(被取消了) because of the terrible weather, they had to go there by train.

All flights ____________________(被取消了) because of the terrible weather, they had to go there by train.

admin2009-04-23  84
问题 All flights ____________________(被取消了) because of the terrible weather, they had to go there by train.
选项
答案having been canceled/called off
解析 首先，从句中是航班flights作主语，所以要用被动语态be cancelled/called off。其次，根据句中的意思可以推断出航班已经被取消，所以要用完成时态。同时，整个一段话只能有一个谓语动词，而且必须在主句中，所以此从句要用非谓语动词having been cancelled/called off。
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大学英语四级

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