问题
选择题
—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
答案：C
句意：相信我，你所有的努力总有一天会有回报的。pay back“偿还”；pay down“即时支付，付定金；(分期付款等)付额款”；pay off“付清；偿清；有回报”；pay for“为……付款”。由句意可知，C项符合题意。
