—Mum, I can't see any point in studying hard.—Come on. dear,Years of hard study will surely in your future career.A.make sureB.pay offC.bring backD.pay back
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B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。