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
Please listen to the teacher carefully. Don't ______ the window.
#53757
A
look out
B
look into
C
look out at
D
look out of
I have to well prepare for the math test tomorrow because it ______ 30% of the final exam.
#61991
A
sets up
B
puts up
C
uses up
D
makes up
--- Where is Mr. Smith? --- He ________ Guangzhou. He ________ there for a week.
#53346
A
has gone to; has been to
B
has gone to; has been
C
has been to; has gone to
D
has been in; has gone to