问题
选择题
After years of hard work, his efforts ________, which was quite a relief. [ ]
A. made up
B. paid off
C. took on
D. hold back
答案
答案：B
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After years of hard work, his efforts ________, which was quite a relief. [ ]
A. made up
B. paid off
C. took on
D. hold back
答案：B