Scientists from different countries are trying to_______ a good way to solve the energy problem.
#56513
A
keep up with
B
come up with
C
catch up with
D
meet up with
推荐题目
I want to watch the news on TV. ________, please.
#60506
A
Turn on it
B
Turn it on
C
Turn off it
D
Turn it off
We would like you ________ and we look forward _________ you.
#62100
A
to come. To see
B
come; to seeing
C
come; to see
D
to come; to seeing