Pollution is a serious problem. Scientists have _______ some good ways to save it.
#55161
A
come up with
B
come on
C
come out
D
come up
推荐题目
I heard him _______ the piano in the next room at 10:00 last night.
#61916
A
played
B
to play
C
playing
D
plays
—Lucy,do you prepare for your trip?—No, I don’t. I will ____ the best way to have our trip.
#58902
A
decide on
B
decide
C
decide to
D
decide in
----Can you _______Chinese？---- No,but I can _______stories.
#52257
A
speak;talk
B
say；tell
C
talk；say
D
speak;tell
It takes ________ half an hour ________ on my bike.
#58719
A
me; to go home
B
them; to go to home
C
his; going home
D
he; go to home