问题
选择题
He was admitted into Beijing University and years of his hard work ________ eventually.[ ]
A. paid off
B. were paid off
C. had paid off
D. had been paid off
答案
答案：A
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He was admitted into Beijing University and years of his hard work ________ eventually.[ ]
A. paid off
B. were paid off
C. had paid off
D. had been paid off
答案：A