大学英语四级模拟试题(5)

　　Questions 81 to 85 are based on the following passage：
　　Automobile drivers and passengers now face a new, unseen danger on theroad： the users of cellular mobile telephones. Looking at the phone whiledialing or speaking can prevent drivers from keeping their hands on thewheel and their eyes on the road； industry experts agree that drivers aremore likely to have an accident while using their phones. That fact hasexcited concern among highway safety organizations in the United States,and some want to ban cellular phones altogether. While manufacturers havenot yet come up with a cellular mobile phone that is completely “hands free”,several companies have recently developed components that could make mobilephones less distracting —— and their users less accident prone.
　　voice Control Systems, Inc., based in Dallas, Tex., has developed amicroprocessor unit that allows standard cellular telephones to “dial”numbers at the sound of a human voice. The voice Dialer unit is attachedto the phone's transmitter and receiver in the car's trunk. Programmedwith a limited vocabulary, it can respond only to digits and specificcontrol commands spoken by the users, who must pause a quarter of a secondbetween each digit or command. （Frequently dialed numbers can be preprog-rammed into simple, single command codes.） The driver picks up the handset,and begins calls by saying “Dial,” followed by the number or command code；a synthesized voice will repeat the number sequence and place the calltold to “Send.” A unique aspect of the voice Dialer is that it is speakerindependent； the unit will respond to any voice regardless of gender,accent or tone.
　　81. Cellular mobile telephones are telephone sets _________. A） used in cars B） capable of being moved in offices or at home C） shaped like cells D） controlled by human voices
　　82. Drivers using cellular mobile telephones are prone to accidents because _____________. A） telephone conversation distracts users from driving B） drivers are often not skillful enough to use them C） they are not reliable D） they are not “hands free”
　　83. Which of the following statements is NOT true？
　　A） The voice Dialer unit is a device which dials numbers by human voice, rather than by hand. B） The voice Dialer allows drivers to pay more attention on driving while dialing. C） The voice Dialer unit can make cellular mobile phones completely“hands free.”D） The voice Dialer was developed by voice Control Systems, Inc.
　　84. The voice Dialer unit is programmed to respond to ____________. A） what the user wants to say B） a special vocabulary used by the driver C） various commands spoken by the user D） only the telephone numbers and specific control commands
　　85. This passage centres on ___________. A） a new hazard on the road B） different kinds of telephones C） a safer car telephone D） voice Control Systems, Inc
　　Questions 86 to 90 are based on the following passage：
　　Having no language, infants cannot be told what they need to learn. Yetby the age of three they will have mastered the basic structure of theirnative language and will be well on their way to communicative competence.Acquiring their language is a most impressive intellectual feat. Studies ofhow children learn language generally agree that the most remarkable aspectof this feat is the rapid acquisition of grammar. Nevertheless, the ability of children to conform to grammatical rules is only slightly more wonderfulthan their ability to learn words. It has been estimated that the averagehigh school graduate in the United States has a reading vocabulary of 80,000words, which includes idiomatic expressions and proper names of people andplaces. This vocabulary must have been learned over a period of 16 years.From the figures, it can be calculated that the average child learns at arate of about 13 new words per day. Clearly a learning process of greatcomplexity goes on at a rapid rate in children.
　　86. According to the passage, approximately how long does it take children to learn the basic structure of their native language？
　　A） One year. B） Three years. C） About two and half years. D） Thirteen years.
　　87. What is the main subject of the passage？
　　A） Language acquisition in children. B） Teaching languages to children. C） How to memorize words. D） Communicating with infants.
　　88. The word “feat” in Line 6 is closest in meaning to which of the following？
　　A） Experiment. B） Idea. C） Activity. D） Accomplishment.
　　89. In Line 10, the word “which” refers to _______. A） their ability B） reading vocabulary C） idiomatic expression D） learning process
　　90. According to the passage, what is impressive about the way children learn vocabulary？
　　A） They learn words before they learn grammar. B） They learn even very long words. C） They learn words very quickly. D） They learn the most words in high school.
　　WRITING
　　Directions： For this part, you are allowed 30 minutes to write a compositionon A Hundred Years from Now in three paragraphs. You are given the first sen-tence each paragraph. Your part of the composition should be no less than 100words, not including the words given. Remember to write clearly. You should write this composition on the Composition Sheet.