(2013·潍坊高考模拟)Air pollution is getting more and more serious，so we must take action________it is too late.
#30055
A
before
B
after
C
until
D
when
推荐题目
Success is how you are viewed by others, _______ achievement is something you do yourself.
#31899
A
while
B
in case
C
even if
D
as long as
Try to read stories in English and speak in English whenever you can，________ you will see more progress over time.
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A
but
B
or
C
and
D
so
_I like to have my photos taken_______there are mountains and rivers.
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A
there
B
in which
C
when
D
where
Paul was not allowed to work he was fully recovered from the flu.
#30379
A
even if
B
whether
C
because
D
until