Air pollution is getting more and more serious, so we must take action ________ it is too late.
#30412
A
before
B
after
C
until
D
when
推荐题目
(2013·天津，6)We have launched another man－made satellite，________is announced in today's newspaper.
#30503
A
that
B
which
C
who
D
what
All of a sudden it came to me ________ I might help wash my mom’s feet on Thanksgiving Day.
#30805
A
if
B
when
C
which
D
that
Remember to think actively as you listen in class, ____ you may fall asleep.
#31538
A
but
B
and
C
or
D
so
, and we each can have one.
#31886
A
A few more books
B
Giving us a few more books
C
To give us a few more books
D
Given us a few more books