问题
选择题
The teacher’s efforts ______ when one of his students was admitted to Beijing University last summer.
A．paid back
B．paid off
C．paid for
D．paid out
答案
答案：B
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The teacher’s efforts ______ when one of his students was admitted to Beijing University last summer.
A．paid back
B．paid off
C．paid for
D．paid out
答案：B