After a week he good ideas to solve the problems.A. caught up withB. came up withC. ended

问题补充：

After a week，he good ideas to solve the problems.

A. caught up with

B. came up with

C. ended up with

D. followed up with

答案：

A. caught up with

(答案→)B. came up with

C. ended up with

D. followed up with

解析：考查短语辨析。catch up with 跟上，赶上，come up with 想出，提出，end up with 以什么结束，follow up with跟上，句意：一周之后，他想出了好办法解决这些问题。故选B。