Pollution is a serious problem. Scientists have _____ some good ways to save it.
#54132
A
come up with
B
come on
C
come out
D
come up
推荐题目
Do you think a cafe is the best place ________friends?
#61409
A
to chat
B
to chat with
C
chat with
D
chatting with
Breakfast is ready, you’d better____.
#58556
A
not wake him up
B
not to wake him up
C
to wake him up
D
wake him up
--- Wang Lin has decided to ______his bad habit of smoking. --- That’s good news. I hope I can do it.
#56481
A
give up
B
set up
C
clean up
D
fix up
We are going to Beijing. Can you _______________when the train will leave ?
#58197
A
look for
B
find for
C
find out .
D
to see