9．For centuries，the only form of written correspondence（通信）was the letter．Letters were，and are，sent by some form of postal service，the history of which goes back a long way．Indeed，the Egyptians began sending letters from about 2000BC，as did the Chinese a thousand years later．
Of course，modern postal services now are much more developed and faster，depending as they do on cars and planes for delivery．Yet they are still too slow for some people to send urgent documents（緊急文件）and letters．
The invention of the fax（傳真）machine increased the speed of delivering documents even more．When you send a fax，you are sending a copy of a piece of correspondence to someone by telephone service．It was not until the early 1980s that such a service was developed enough for businesses to be able to fax documents to each other．
The fax service is still very much in use when copies of documents require to be sent，but，as a way of fast correspondence，it has been largely taken the place of by email，Email is used to describe messages sent form one computer user to another．
There are advantages and disadvantages with emails．If you send someone an email，then he will receive it extremely quickly．Normal postal services are rather slow as far as speed of delivery is concerned．
However，if you write something by email，which you might later regret，and send it immediately，there is no chance for second thoughts．At least，if you are posting a letter you have to address and seal（封）the envelope and take it to the post box．There is plenty of time to change your mind．The message is think before you email!
25．We can learn from the text thatC．
A．the postal service has over the years become slower
B．email is less popular than the fax service
C．the postal service has over the years become faster
D．the fax service has a history as long as the postal service does
26．It can be inferred from the text thatC．
A．the fax machine was invented after the 1980s
B．letters have been used in China for about 1，000years
C．the fax service had been fully developed by the 1980s
D．letters have been used in Egypt for about 2，000years
27．In the last paragraph，the writer mentions"think before you email"to show thatA．
A．you'd better not send your email in a hurry
B．you may regret if you don't seal your envelope
C．you may regret before you send something by email
D．you need plenty of time to send an email
28．The text mainly deals withD．
A．the invention of fax machines
B．the advantage of fax machines
C．the advantage of emails
D．the progress in correspondence．
分析 本文講述了通訊的發(fā)展和由此帶來的變化，著重于不同通訊方式的比較和發(fā)展過程．
解答 CCAD
25．C 這是一道細(xì)節(jié)推斷題．根據(jù)第二段第一句"modern postal services now are much developed and faster"可知現(xiàn)代的郵政服務(wù)比以前更發(fā)達(dá)、更快，故選C．
26．C 這是一道推斷題．根據(jù)"It was not until the early 1980s that such a service has developed enough …"可以推斷20世紀(jì)80年代初fax已經(jīng)比較發(fā)達(dá)可以滿足商用了，所以選C．
27．A 這是一道細(xì)節(jié)題．由于email方便高速，可供考慮的時間很短，如果發(fā)現(xiàn)問題就來不及了，所以作者建議發(fā)送前多想想，選A．
28．D 這是一道主旨題．本文講述了通訊的發(fā)展和由此帶來的變化，著重于不同通訊方式的比較和發(fā)展過程，而不是單單針對某種方式來講述．D選項最貼近這一點．
點評 閱讀這類文章時，也應(yīng)該在整體把握文章結(jié)構(gòu)的前提下，主要注意細(xì)節(jié)信息．細(xì)節(jié)題題干都是相應(yīng)原文的變形（如同義改寫、詞性轉(zhuǎn)換等），因此要找到答案一定要找到題干在原文中的出處，再把原文和選項相比較．做題時，根據(jù)所提問題用尋讀、跳讀的方法可達(dá)到事半功倍的效果．
