—Does he know how to work out the problem?---Yes, he has ___ a good idea to solve it.     ----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

要提高客户的满意程度，（）必须有明显的提高；

A、技术价值

B、核心服务的价值

C、信息的沟通

D、服务时间