20．They first met each other ten years ago and they ______ good friends ever since．（　　）
A．had beenB．have madeC．had madeD．have remained

分析 他們十年前第一次見面，從那以后，他們一直保持好朋友的關(guān)系．

解答 答案：D
題干中ever since從那時起，表示從過去到現(xiàn)在的時間，是現(xiàn)在完成時態(tài)的時間狀語；make friends交朋友，是短暫性動詞，不能與段時間連用．故選D．

點(diǎn)評 現(xiàn)在完成時表示過去發(fā)生的動作對現(xiàn)在造成的影響或結(jié)果或表示過去的動作或狀態(tài)持續(xù)到現(xiàn)在．用法有：過去發(fā)生的某一動作對現(xiàn)在造成的影響或結(jié)果或到現(xiàn)在為止已經(jīng)發(fā)生或完成的動作；表示過去發(fā)生的并且持續(xù)到現(xiàn)在的動作或狀態(tài)．

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