The scientists are beating their brains, trying to ______ a solution to the problem.
#64469
A
look up to
B
live up to
C
come up with
D
keep up with
推荐题目
Dress warmly, _____ you'll catch cold. 
#83714
A
on the contrary
B
or rather
C
or else
D
in no way
Do these plans ________ your arrangements?
#70965
A
catch up with
B
put up with
C
get on with
D
fit in with