摘要： All flights because of the snowstorm, many passengers could do nothing but take the train . A．had been canceled B．have been canceled C．having been canceled D．being canceled
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All flights ____ because of the snowstorm, many passengers could do nothing but take the train.
| A．had been canceled | B．have been canceled |
| C．having been canceled | D．being canceled |
All flights ____ because of the snowstorm, many passengers could do nothing but take the train.
A．had been canceled B．have been canceled
C．having been canceled D．being canceled
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