The flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceleThe flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceledB)was canceledC)having canceledD)having been canceled

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TheflighttoChicago______becauseoftheheavyfog,wehadtotakethetrain.A)hadbeencanceleTheflighttoChicago_

The flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceleThe flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceledB)was canceledC)having canceledD)having been canceled
The flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been cancele
The flight to Chicago ______ because of the heavy fog ,we had to take the train.
A)had been canceled
B)was canceled
C)having canceled
D)having been canceled

The flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceleThe flight to Chicago ______ because of the heavy fog ,we had to take the train.A)had been canceledB)was canceledC)having canceledD)having been canceled
D

选B
由于大雾,飞往芝加哥的航班被取消了。

A

B (飞往芝加哥的航班被取消了)
航班取消的事件发生在我们坐火车的事件之前;而坐火车用的是过去时,那么再之前的动作就应该用过去完成时。