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
My uncle knew little about the famous film Queen he saw it yesterday evening.
#55373
A
if
B
and
C
until
D
because
—Will you go to Nanjing by bus _____ by plane?—By plane. It is expensive ______ fast.
#56971
A
or; but
B
or; and
C
and; but
D
and; and
–Do you offer any discount on the notebooks? –Sorry, sir. There isn’t a discount you pay more than 100 yuan.
#55450
A
although
B
until
C
unless
D
as
_____ he was tired , ____ he didn’t stop working .
#57240
A
Although ; but
B
Though; /
C
But ; /
D
Though ; but
_______ Mary ______ John has been to China before, but they know a lot about it
#57612
A
Either, or
B
Both, and
C
Neither, nor
D
Not only, but also