问题
选择题
All of Kyle's studying ________, and he got a perfect score on his exam.[ ]
A. paid for
B. paid back
C. paid out
D. paid off
答案
答案：D
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All of Kyle's studying ________, and he got a perfect score on his exam.[ ]
A. paid for
B. paid back
C. paid out
D. paid off
答案：D