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Tom, clean up the broken glass _________ someone walks on it.
#31009
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since
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when
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before
D
as
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We’d better set off，or it will be dark         we know it.
#80424
A
before
B
after
C
when
D
until
(2014·四川六校高三联考)________is surprising is that there are so many Chinese restaurants in Toronto.
#30030
A
It
B
That
C
Such　
D
What
He asked me just to sit down and drink some water ____ I could say anything about my travel plan.
#33155
A
while
B
when
C
if
D
before
The elderly patients still prefer the traditional way, ______ online booking system is supposed to be convenient and fast.
#31880
A
while
B
though
C
unless
D
as
.  Some people say more but do less ______ others do the opposite.
#33148
A
once
B
when
C
while
D
as