Since you are always working hard at your lessons your efforts will .A. pay offB. pay for

问题补充：

Since you are always working hard at your lessons, your efforts will .

A. pay off

B. pay for

C. pay back

D. pay out

答案：

(答案→)A. pay off

B. pay for

C. pay back

D. pay out

解析：A 考察动词短语辨析。Pay off还清，得到回报；pay for支付；pay back偿还；pay out付出。句义：既然你总说非常勤奋，你的努力总会得到回报的。