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
推荐题目
--Did Peter repair his bike?--He _______, because he could’t do that himself.
#91550
A
had it repaired
B
had it to repair
C
had it repairing
D
had repaired it
He likes books ________ science because he wonders what and why our world is.
#96368
A
relating to
B
related to
C
connecting to
D
connected to