(2014·兰州高三质检)Our country is developing at an amazing speed，which is________makes me feel so proud.
#30033
A
what
B
why
C
that
D
where
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—Do you know about the accident which happened in the center of the city?—Yes. But it was some time we realized the truth.
#29991
A
before
B
when
C
since
D
Until
(2012·南京高二检测) Some people are worrying about the possibility _______ mobile phones could be responsible for a range of illnesses, from rashes (皮疹) to brain tumors.
#30086
A
that
B
why
C
how
D
whether
You are allowed to go out______ you promise to be back before 11 o'clock tonight.
#31374
A
so long as
B
so far as
C
as soon as
D
as far as
How can you expect him to make any progress _____ you never give him a chance to have a try?
#30913
A
when
B
unless
C
even though
D
until