– 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
The head teacher with his students ____ the park if it __________tomorrow.
#41637
A
is going to; doesn't rain
B
are going co; won’t rain
C
is going to; won't rain
D
are going to; doesn't rain
Mr. White _____in that city since he moved there thirty years ago.
#41515
A
lives
B
lived
C
was living
D
has lived
—Excuse me. Please look at the sign "NO PARKING HERE".—Oh, sorry. I _____ it.
#41527
A
don't see
B
didn't see
C
won't see
D
haven't seen
It is said that potato chips ____________ by mistake about a hundred years ago.
#41556
A
invent
B
invented
C
are invented
D
were invented
---Where_____ you _____ these days? I haven’t seen you long.---To Britain. I left for London two months ago and returned last week .
#41927
A
do, go
B
will, go
C
have, gone
D
have, been