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
If you don’t like the drink you , just leave it and try a different one.
#52066
A
ordered
B
are ordering
C
will order
D
had ordered
--- you tired after the visit?--- No, I .
#52522
A
Did, didn’t
B
was, wasn’t
C
Were, weren’t
D
Were, wasn’t
My cousin used to ________ online too late, but now she is used to ________ to bed early.
#53197
A
chat; go
B
chatting; go
C
chatting; going
D
chat; going
He spent thirty minutes in finishing his homework.
#58045
A
It took him half an hour to finish his homework.
B
It takes him half an hour to finish his homework.
C
It cost him half an hour to finish his homework.
D
He spend half an hour to on finishing his homework.