题海让大学四年没有难题
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单选题 27. All flights ____, because of the snowstorm, many passengers could do nothing but take the train

A. were canceled

B. had been canceled

C. having been canceled

D. have been canceled

大学英语(第二册)第6期课程封面

学科:大学英语(第二册)第6期

时间:2025-05-05 10:38:46

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