Question

He started to walk faster and the children had to run to ________him.

A．come up with

B．catch up with

C．keep up with

D．put up with

Answer 1

C

考查短语辨析。come up with提出，想出，catch up with赶上，keep up with不落在后面，put up with 忍受，句意：他开始走的快一些并且孩子们不得不跑为了部落在他后面。所以选C。