解析：选D　细节理解题。由第一段中的"But I think I don't have a good sense of humour．"可以得出答案。

　　6．By telling his own experience, Brad tried to make Radha Karnik believe that ________．

　　A．laughter is the best medicine

　　B．laughter and humour go hand­in­hand

　　C．a sense of humour can be developed

　　D．a sense of humour helps impress others

　　解析：选C　推理判断题。由第二段和第三段可以看出，幽默感是可以提高的。故选C。

　　7．In order to improve our sense of humour, Brad believes that the following are important EXCEPT ________．

　　A．good language ability B．loyalty

　　C．learning from life D．confidence

　　解析：选B　推理判断题。文中并没有提及忠诚。故选B。

　　8．Radha Karnik is warned not to be funny ________．

　　A．improperly B．frequently

　　C．naturally D．differently

　　解析：选A　细节理解题。最后一段中布拉德提醒：幽默一定要根据情况合理运用。故选A。

　　C

　　Darno Setiadi is one of the top ten thousand richest men in Indonesia． Mr Setiadi runs his own business, importing (进口) machinery from Europe and selling it all over the country． He employs over three hundred people and lives in a very large house in Jakarta, the capital city． However, as he will tell you, he had to travel down a long, hard road to get to where he is today．

　　"I built this business up from nothing through my own hard work，" said Darno．"I come from a poor family and have thirteen brothers and sisters． My dad died when I was fourteen and I had to go out to work to try to support the rest of my family． To begin with, I sold ice cream in the street; then I got a job selling cloth door­to­door． After that, I started traveling all over the island selling things to people and slowly I started getting ideas about what kind of products the different markets wanted"．

　　"When I was twenty­one, I left my wife and two children at home and moved to Jakarta to set up my own business, selling all kinds of machines, but, particularly propellers (螺旋桨) for boats． There are over thirteen thousand islands in Indonesia, so there's a huge market for that kind of thing． Luckily for me, some friends helped me get import licenses． Business was increasing and I could finally afford to bring my family over to join me．

　　"The only real problem I have now is who's going to take control of the business when I retire (退休)． I'd like my son to run it, but he's not really strong enough to do it! I think perhaps his childhood was too easy, and that has made him a bit too soft to do work like this！"

　　9．What does Darno sell now?

　　A．Cloth． B．Boats．

　　C．Machines． D．Ice cream．

　　解析：选C　细节理解题。根据第一段中的"Mr Setiadi runs his own business, importing machinery from Europe and selling it all over the country．"可知，Darno做的是机器销售的生意。

　　10．When Darno was in his early teens, he ________．

A．helped with his family business