注意：此页面搜索的是所有试题
题目内容
（安徽理工大学-金融学）
All the flights _____because of the snowstorm, we had to take the train instead.
A、were canceled
B、had been canceled
C、having canceled
D、having been canceled
A、were canceled
B、had been canceled
C、having canceled
D、having been canceled
参考答案
