3，The man went to great lengths to prove that the diamonds were real. 新概念学习

real:     真的，不是捏造出来的，非人工制造的（= genuine）

true:     与事实或现实符合 ( ≠false )

genuine:  不是伪造的，非人工制造的（常用来修饰金银、字画、古董 ≠fake）

real reason, real fears, real / genuine money, real / genuine diamond

4,  It took me over half an hour to get rid of him.

  It take sb. sometime to do sth. 花费某人时间做某事

get rid of 摆脱，除去；治好=cure

He can never get rid of his debts. （~ debt ==pay off:还清）
 

5, The next man to approach me was selling expensive pens and watches.

 The next man to approach me:第二个向我兜售的人，靠近我的人