In addition to using massive rule-programmed machines, computer programmers are also trying to teach computers to learn how to think for themselves through the "experience" of translating. Even with these efforts, programmers admit that a "thinking" computer might not ever be invented in the future.

　　46. Computers today are capable of ______.

　　A. defeating the best chess player in the world.

　　B. telling subtle differences between languages

　　C. translating over 60 percent of difficult texts.

　　D. doing human-like common sense reasoning

　　47. According to the passage, which of the following is NOT true?

　　A. Computers can translate dry and difficult phrase.

　　B. Computers can understand sensitive language.

　　C. Computers can translate technical language

　　D. Computers can understand pre-programmed word.

　　48. The major problem with computer translating programs is that computers ______.

　　A. can not translate illogical sentences

　　B. do not have a large enough capacity of memory

　　C. can not understand grammatical rules

　　D. do not have intuition to process language

　　49. To improve machine translation, computer programmers are trying to______.

　　A. use powerful rule-programmed computers

　　B. teach computers to think by practice

　　C. have computers compile translating dictionaries

　　D. add explanations of words in computer programs

　　50. The passage suggests that ______.

　　A. the accuracy rate of machine translation cannot be raised

　　B. it is impossible for computers to think as humans do

　　C. only technical language is suitable for machine translation

　　D. it is impossib1e to determine of identical words

　　Passage Five

　　Several years ago during the dot-com passion, Manhattan lawyer John Kennedy sometimes wore a dark blue suit to meet potential Internet clients. But he soon realized that his conservative clothes were a strike against him before he even shook hands. so he began to do business in casual, open-shirt clothes.

　　But now the tables have turned. Today Silicon Valley executives are the ones often coming out in suits. No wonder that fortune 500 executives are dusting off their silk ties and pants. “I would say there is a trend now toward a little more business dress,” said Kennedy. “I find myself wearing suits more.”

　　While there isn’t a rush toward formal office wear, clothiers and executives say the workplace uniform is heading that way. In many offices, men are wearing Jackets, ties and pants more frequently than a year age. Top women executives never went as casual as men, so the shift doesn’t affect them as dramatically.

　　“Business casual” took several years to catch on. It started with casual Fridays, evolved to casual summers, then became casual everyday. ……

　　Observers mention many factors driving the trend Internet companies helped lead the dress-downmovement and other industries followed suit to attract workers. But with the collapse of many dot-coms, the relaxed look is becoming a style to avoid. Moreover, as the economy stumbles, more people are hunting for jobs or trying to keep the ones they have, and appearance counts.