问题
选择题
David’s effort was ______, because he won the first prize in the English speech contest, which made his classmates surprised.
A．paid off
B．paid back
C．paid for
D．paid up
答案
答案：A
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David’s effort was ______, because he won the first prize in the English speech contest, which made his classmates surprised.
A．paid off
B．paid back
C．paid for
D．paid up
答案：A