—Does he know how to work out the problem ?—Yes he has a good idea to solve it .A. caugh

问题补充：

—Does he know how to work out the problem ?

—Yes , he has a good idea to solve it .

A. caught up with

B. kept up with

C. come up with

D. put up with

答案：

A. caught up with

B. kept up with

(答案→)C. come up with

D. put up with

解析：catch up with：跟上，赶上；keep up with：跟上；come up with 找到，想起；put up with：容忍.忍受，他已找到了解决问题的方法。故选项C。