【题目】Happily for Johns mother, he is working harder to ______ his lost time.
A. make up for B. keep up with
C. catch up with D. make use of
在线课程【答案】A
【解析】
试题分析：考查短语。句意：为了约翰妈妈的快乐，他每天工作很努力来弥补他失去的时间。 A. make up for 弥补；B. keep up with 赶上； C. catch up with 赶上； D. make use of利用；根据句意知选A。