—Mum I can't see any point in studying hard.—Come on. dear Years of hard study will surel

问题补充：

—Mum, I can see any point in studying hard.

—Come on. dear,Years of hard study will surelyin your future career.

A. make sure

B. pay off

C. bring back

D. pay back

答案：

A. make sure

(答案→)B. pay off

C. bring back

D. pay back

解析：考查动词短语辨析。Make sure保证，确保；pay off (努力)得到回报；

bring back拿回；使…回想起 pay back报答，偿还；句意：多年的努力学习在未来的事业中一定会有回报的。