问题补充:
--- Believe me, all your efforts will some day. --- Thanks for your encouragement.
A. pay back
B. pay down
C. pay off
D. pay for
答案:
A. pay back
B. pay down
(答案→)C. pay off
D. pay for
解析:词义辨析。pay back偿还,报复;pay down即时支付,付定金;pay off付清,取得成功;pay for为……付款。句意:相信我,你的所有努力有一天一定会获得成功。谢谢你的鼓励。所以选C。