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
网友回答
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，e 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。