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You should go over your test paper _____ you hand it in.
#56787
A
before
B
though
C
because
D
as soon as
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Many people believe we will face environmental disasters _________ we completely change the way we live.
#57124
A
but
B
though
C
unless
D
until
Grace Brown __________ play tennis every day．
#58071
A
isn‘t
B
don’t
C
aren’t
D
doesn’t．
 I enjoy the popular dance “hip-hop” ,but _____ my father ____  my mother likes it. 
#57455
A
both ;and
B
ont only; but also
C
either ;or
D
neither ;nor
________ I got on the bus, he got off.
#55991
A
As
B
While
C
Until
D
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This sign means “ _____.”
#57944
A
No parking
B
No U-turn
C
No right turn
D
No left turn