– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.
#39701
A
polluted, must do
B
had polluted , must be doing
C
have polluted , must be done
D
were polluting, must be done
推荐题目
We’ll have a picnic if it ______ tomorrow. 
#37768
A
rains
B
will rain
C
doesn’t rain
D
won’t rain
 –Where are you going for your holiday?--Well, we _______ yet.
#42779
A
haven’t decided
B
hadn’t decided
C
don’t decide
D
didn’t decide
There ____ a talk show on CCTV-4 at eight this evening .
#39431
A
is going to be
B
will have
C
is going to have
D
is having