问题
选择题
Happily for the boy's parents, he is working harder and harder to________ his lost time.[ ]
A. make up for
B. catch up with
C. make use of
D. keep up with
答案
答案：A
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Happily for the boy's parents, he is working harder and harder to________ his lost time.[ ]
A. make up for
B. catch up with
C. make use of
D. keep up with
答案：A