During the next ten years we both worked day and night to the money we had borrowed. A. p

问题补充：

During the next ten years we both worked day and night to

the money we had borrowed.

A. pay off

B. pay for

C. pay to

D. pay back

答案：

A. pay off

B. pay for

C. pay to

(答案→)D. pay back

解析：本题的含义是在接下来的十年，我们夜以继日的工作为了把我们所借的钱偿还掉，pay back表示偿还的意思，故本题选D。