80. 答案：B?

　　【参考译文】这篇文章的论题是什么？? (来源：专业英语学习网站 http://www.EnglishCN.com)

　　【试题分析】本题为主旨题。?

　　【详细解答】综观全文，作者在文中主要讨论了导致人员迁徙的四种不同动机，故答案选B

　　SECTION B SKIMMING AND SCANNING ［5 min］?

　　In this section there are seven passages with a total often multiple-choice questions. Skim or scan them as required and then mark your answers on your answer sheet.??

　　TEXT E

　　First read the following question.??

　　81.    This is a letter of___.?

　　A.    inquiry            B. complaint        C.explanation    D introduction ?

　　Now, go through TEXT E quickly and answer question 81.??

　　Flat 24?

　　Park Mansions?

　　Newbury Road??

　　The Manager?

　　Reliable Motors Ltd.?

　　876 Meadow Street 14th May 2002??

　　Dear Sir,?

　　I am writing to you concerning the Bernster Special 150 SE that I bought from yo u two weeks ago. The car has now developed the following faults:?

　　1.    The steering wheel is loose.?

　　2.    The hand brake does not work.?

　　3.    Oil is leaking from the engine.?

　　4.    The driver's door-does not close properly.?

　　Will you please telephone me and we can arrange for you to collect the car. Unle ss you can put the car in perfect working order, 1 am afraid I shall report your  company to the Consumers' Association.?

　　Yours faithfully,?

　　Tony Lockwood??

　　TEXT F

　　First read the following question.???

　　82.    The passage is mainly about___.?

　　A.    Christmas sales B.    retailing business? C.    Internet population D.    online shopping ??

　　Now, go through TEXT F quickly and answer question 82.Online shopping (网上购物) has become a major force in retailing this year with more than US$1 billion in Christmas season sales, industry analysts say.The figure for the holiday tops the total for Internet shopping in all of 1996. Online shopping for the holiday season remained just a drop in the ocean of the estimated? US$450 bilion spent by US consumers. But the figure is growing rapidly.International Data Corporation, a market research group, predicts the World Wide  Web (万维网) population will reach almost 100 million by 1998 and that online c ommerce will grow to more than US$20 billion.?