All flights___ because of the snowstorm, we decided to take the train. 
#94777
A
were canceled 
B
had been canceled
C
having canceled
D
having been canceled
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__________of danger in the street at night, she had to go home, with a friend_________ her. 
#94580
A
Warned, followed
B
Warning, following
C
Having warned, following
D
Having been warned, following
---What do you think of his talk on Information Technology? ---Oh, excellent. It's worth ________.
#89657
A
listening to
B
being listened to
C
listening of
D
to be listened to