All flights ()because of the storm, they decided to go to Beijing by train.
A.正确答案Ahaving been canceled
B.had been canceled
C.having canceled
D.were canceled
All flights ()because of the storm, they decided to go to Beijing by train.
All flights ()because of the storm, they decided to go to Beijing by train.
A.正确答案Ahaving been canceled
B.had been canceled
C.having canceled
D.were canceled