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
My grandmother looks forward to _________my aunt in Hong Kong.
#56095
A
hanging out
B
taking a trip
C
hearing from
D
turning down
Luo Yang devoted all his life _________for China Nation Aviation(中国航天).
#56962
A
to work
B
work
C
to working
D
worked
—How about going shopping this weekend, Peter? —Sorry. I prefer ______ rather than ______.
#63225
A
to stay at home, go out
B
to go out, stay at home
C
staying at home, go out
D
going out, stay at home
There is _______ with your computer. Why not have it _______?
#60601
A
nothing wrong; repaired
B
nothing wrong; repair
C
something wrong; to repair
D
something wrong; repaired