D．Humor makes fun of any difficult situation.

　　解析：选B　主旨大意题。从文章结构上分析，作者在首段中就提出了本文的中心论点，而且其后的三段都对中心论点加以说明。首段的第一句又是本段的中心，下面所列出的一些幽默的作用都是具体的方面。故应选B项。

　　2．Which of the following is NOT stated in the passage?

　　A．Comedians on TV are believed to have done a lot in making people more tolerant (容忍) of racial and religious differences.

　　B．To make up differences, humor is a most acceptable and effective means.

　　C．People often turn to humorous ways when meeting with difficult situations because of its effectiveness.

　　D．Only by adopting the means of humor can one succeed in some jobs.

　　解析：选C　细节理解题。选项A、D内容分别位于第一段的末句和第三句中，选项B的内容虽然在原文中没有直接出现，但与第一段中所含意思相同。

　　3．What caused the roast turkey to drop onto the floor?

　　A．The backward movement of the door.

　　B．The son's rude behavior.

　　C．Someone happened to be at the door.

　　D．The bird raised by the family.

　　解析：选A　细节理解题。根据第三段的最后一句可知他成功地用肘部推开了门，但是复位的门却将火鸡打到了地上。故应选A项。

　　4．What do you think would probably be the result if the hostess got angry and scolded the son?

　　A．It would make the embarrassing situation worse.

　　B．The son would refuse to serve the guests any more.

　　C．The son would talk back and make the mother all the more angry.

　　D．The guests would leave before the dinner was over.

　　解析：选A　推理判断题。由最后一段可推知答案。

　　B

　　Welcome to Medellin, Colombia

　　Climate - Medellin is about 1,538 meters above sea level. Its climate is not as hot as other cities located near the equator (赤道). The city's average temperature is 22℃.

Getting here - Medellin has an international airport, with flights (航班) from Miami,