(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
So quickly are science and technology advancing ________ is a possibility today may be a reality tomorrow.
#30322
A
which
B
what
C
that which
D
that what
She hasn’t had time to travel around ______ she started her new job.
#34765
A
since
B
but
C
yet
D
however
I was on the highway _______ this car went past followed by a police car. They ______ at least 150 kilometers an hour.
#32322
A
when; should have been driving
B
while; would have driven
C
as; could have driven
D
when; must have been driving
— Why was it so noisy over there? — The Twins were surrounded by their fans ____ they stepped out of the hall.
#30811
A
until
B
the moment
C
in case
D
so that