also learn that there's a tremendous amount that no one understands yet.

　　语篇解读：本文是一篇文章的引言。作者通过比尔·盖茨和通用汽车公司总裁的幽默谈话向我们讲述了"笑"的作用：可以促进我们的身体健康，增强抵抗疾病的能力。

　　1．What's the best title of the passage?

　　A．Laughter

　　B．The joke between Gates and the president of General Motors

　　C．Why do we laugh?

　　D．Laughter and health

　　解析：选D　标题归纳题。综观全文可以看出，文章通过一个幽默引出了笑的作用：可以增进我们的身体健康，增强抵抗疾病的能力。

　　2．Which one is NOT true according to the passage?

　　A．Computer technology has developed quickly during the past few decades.

　　B．Automotive technology has developed as fast as computer technology according to Bill Gates.

　　C．The president of GM thinks it is impossible to build cars worth less than 50 dollars.

　　D．If cars were less than 50 dollars, a large number of accidents would happen per day.

　　解析：选B　细节理解题。文章第一段的"If automotive technology had ... instead of a V­8"用的是虚拟语气，故该句中的描述与事实不符。

　　3．The underlined word"sitcoms" in Paragraph 3 means "________"．

　　A．situation comedies B．tragedies

　　C．body language D．fictions

　　解析：选A　词义猜测题。该词的意思应和此句前面的"Jokes(笑话)"以及后面的"comedians(喜剧演员)"接近，故选A。而"tragedies(悲剧)"， "body language(身势语)"，"fictions(小说)"均不在此列。

　　4．This passage is most probably an ________.

　　A．introduction of an article about Microsoft

　　B．introduction of an article about laughter

　　C．article about laughter

　　D．introduction of an article about General Motors

解析：选B　推理判断题。由最后一段的后半部分尤其是"In this article, we'll ..."可以看出，该文是一篇文章的引言，用来吸引读者，介绍文章的内容。