因为人们对此的评判标准不一样。

　　2．In the author's opinion, the first joke ________.

　　A．is really funny and amusing

　　B．is not as funny as those experts thought

　　C．shows people's wrong understanding of hunters

　　D．tells readers never to look down on brave hunters

　　解析：选B　推理判断题。根据第三段第一句可知，作者认为这个笑话只是略微好笑，而第二段中提到专家们将这个笑话选为世界上最好笑的笑话。由此可推知，作者认为这个笑话没有专家们认为的那么好笑。

　　3．Which of the following influences the understanding of a joke most?

　　A．The reader's mood.

　　B．The reader's cultural background.

　　C．The characters' style of language.

　　D．The number of funny points in the joke.

　　解析：选B　细节理解题。根据第三段第二句和倒数第二段第二句可知，读者的文化背景是理解笑话的最重要的因素。

　　4．In most cases, the completely necessary point of a joke is ________.

　　A．a result beyond expectation

　　B．the mention of great people

　　C．extremely funny behavior

　　D．the use of special phrases

　　解析：选A　细节理解题。根据倒数第二段第三句可知，出乎意料的结尾对大多数笑话来说是必不可少的。

　　B

　　Kuringai Chase National Park

　　Guided Walks and Nature Activities

　　SUNDAY MAY 7 EASY

　　Early Morning Walk in Upper Lane Cove Valley

　　Meet at 7：30 am at the end of Day Rd, Cheltenham while the bush is alive with birdsong.

　　Round trip: 4 hours

　　FRIDAY MAY 12 MEDIUM

Possum Prowl