问题
选择题
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
答案
答案: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。