. With their son ______ a foreign college now, the parents have some financial problems now and then.
#91538
A
to attend
B
attending
C
attended
D
having attended
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All flights _____because of the snowstorm,we decided to take the train instead.
#91303
A
were canceled
B
had been canceled
C
having canceled
D
having been canceled
You cannot imagine how she finished the race _____ her foot wounded so badly.
#91396
A
for    
B
when    
C
with   
D
while
I couldn’t do my homework with all that noise           .
#91398
A
going on
B
goes on
C
went on
D
to go on