And last，having confidence that you are witty is important. There will always be someone wittier or funnier than you，which is fine. Just work on building your own style.

　　Remember，if you are trying to be funny and witty in order to break the ice at a business function，be careful.

　　In those situations，humour has to be mild and politically correct.

　　Yours，

　　Brad

　　21．Radha Karnik's problem is that he doesn't __D__.

　　A．have friends

　　B．know the functions of humour

　　C．understand others' humour

　　D．have a good sense of humour

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

　　22．By telling his own experience，Brad tried to make Radha Karnik believe that __C__.

　　A．laughter is the best medicine

　　B．laughter and humour go hand in hand

　　C．a sense of humour can be developed

　　D．a sense of humour helps impress others

　　解析：推理判断题。由第二段和第三段可以看出，幽默感是可以培养的。

　　23．In order to improve our sense of humour，Brad believes that following are important EXCEPT __B__.

　　A．good language ability B．loyalty

　　C．learning from life D．confidence

　　解析：推理判断题。文中并没有提及忠诚。

　　24．Radha Karnik is warned __A__.

　　A．not to be funny improperly

B．not to be funny frequently