We hope you can a better idea to solve the pollution problem.A. look outB. come up withC.

问题补充：

We hope you can a better idea to solve the pollution problem.

A. look out

B. come up with

C. get along with

D. catch up with

答案：

A. look out

B. come up with

C. get along with

D. catch up with

解析：look out注意，当心；come up with提出，想出；get along with与……和睦相处，取得进展；catch up with赶上，追上。句意：我们希望你能想出一个更好的主意来解决污染问题。结合语境可知选B。