I arrived at the airport ________ the plane had taken off.
#57885
A
after
B
while
C
when
D
before
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—I am trying my best to learn English, but it doesn’t work well!—Don’t worry! Regard it _____ a big challenge!
#58178
A
to
B
with
C
for
D
as
— I hear the famous singer Xu Song may come to Weifang next month.— Really? _______ he comes, my younger sister will be very excited.
#57609
A
If
B
Until
C
Unless
D
Before