I hate travelling by air_______ you usually have to wait for hours before the plane takes off.
#55620
A
because
B
though
C
until
D
Unless
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— 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
we’ll go to the Great Wall___ there is heavy rain tomorrow. OK! Walking on the Great Wall must be great fun.
#55445
A
as soon as
B
when
C
unless
D
if
My sister ______ go to bed _______ my mother came back last night.
#55654
A
not until
B
doesn't; until
C
didn't; until
D
aren't; until