The rivers will become dirtier and dirtier ______ we take action to protect them.
#56392
A
since
B
if
C
until
D
unless
推荐题目
--- What do you think of the film?--- Fantastic. _______ the children_______ their father likes to see it.
#56135
A
Both; and
B
Either; or
C
Not only; but also
D
Neither; nor
---Why would some workers in Foxcon die __________ continue working in the factory? ---Psychologists say they are under too much pressure.
#58525
A
better than
B
by accident
C
instead of
D
rather than
— Can you tell me ______ it is from here to the Summer Palace?— Let me see. It's about 15 minutes' ride.
#57747
A
how long
B
how soon
C
how much
D
how far
Jim came into the room ______ Millie sat down on the chair last night.
#55638
A
as
B
while
C
when
D
since