Annealing is a way of making metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly, for example by dipping (浸) it in water, it will be very hard but also very brittle-that is, it will break easily. Metal that has been annealed is soft but does not break as easily. It is possible to make metal as hard or as soft as it is wished, by annealing it. The metal is heated, and allowed to cool slowly for a certain length of time. The longer the heated metal takes to cool slowly, the softer it becomes. Annealing can also be used on other material, such as glass.（1990NMET）
①Why do people put hot metal in water?
A. To make it hard. B. To make it soft. C. To make it cool. D. To make it brittle.
例2：At one time, computers were expected largely to remove the need for paper copies of documents (文件) because they could be stored electronically. But for all the texts that are written, stored and sent electronically, a lot of them are still ending up on paper.
It is difficult to measure the quantity of paper used as a result of use of Internet-connected computers, although just about anyone who works in an office can tell you that when e-mail is introduced, the printers start working overtime. "I feel in my bones this revolution is causing more trees to be cut down," says Ted Smith of the Earth Village Organisation.
Perhaps the best sign of how computer and Internet use pushes up demand for paper comes from the high-tech industry itself, which sees printing as one of its most promising new markets. Several Internet companies have been set upto help small businesses print quality documents from a computer. Earlier this week Hewlett-Packard Co. announced a plan to develop new technologies that will enable people to print even more so they can get a hard copy of a business document, a medical record or just a one-line e-mail, even if they are nowhere near a computer. As the company sees it, the more use of the Internet the greater demand for printers.
Does all this mean environmental concerns(环境问题) have been forgotten? Some activists suggest people have been led to believe that a lot of dangers to the environment have gone away. "I guess people believe that the problem is taken care of, because of recycling(回收利用)," said Kelly Quirke, director of the Rainforest Action Network in San Francisco. Yet Quirke is hopeful that high-tech may also prove helpful. He says printers that print on both sides are growing in popularity. The action group has also found acceptable paper made from materials other than wood, such as agricultural waste.（2003年全国卷）
④The growing demand for paper in recent years is largely due to___________．
A．the rapid development of small businesses B．the opening up of new markets
C．the printing of high quality copies D．the increased use of the Internet
近年来纸张用量增加的原因何在?第2段中做出解释：It is difficult to measure the quantity of paper used as a result of use of Internet-con-nected computers，．．．when e-mail is introduced， the printers start working overtime．．．The growing demand for paper看来正是a result of use of Internet-connected computers．本题答案为D．其余3个选项内容虽然也都在短文不同地方有所涉及，但均非题干所问纸张用量增长的直接原因，可逐一排除．
中，C项干扰性最大，第3段中所提及的Several Internet companies have been set up to help small businesses print quality documents from a computer 与选项C十分接近，因而对他们构成迷惑，这是因为考生没有能够认识到这一事实出现在本段中，只是为了说明how computer and Internet use pushes up demand for paper comes from the high-tech industry itself，然而the printing of high quality copies本身并非纸张需求增长的原因．
⑤Environmentalists believe one possible way of dealing with the paper situation is_________．
A．to encourage printing more quality documents B．to develop new printers using recycled paper
C．to find new materials for making paper D．to plant more fast-growing trees
[分析]本题问及环保人士(environmentalists)对于用纸所引起的环保问题的解决途径所持看法．结尾段中谈到：The action group (= the environmentalists) has also found acceptable paper made from materials other than wood， such as agricultural waste，也就是本题选项中的C项to find new materials for making paper．
考虑B项，文中为：the problem is taken care of， because of recycling．．．；．．．printers that prin to on both sides are growing in popularity(结尾段)；两处内容综合衍生而成选项B．但并未说有使用recycled paper的new printers，本项应排除．
D项所说的plant more fast-growing trees则在文中完全没有提到．[答案] c
⑥Hewlett-Packard Co． has decided to develop new technologies because ________．
A．people are concerned about the environment B．printers in many offices are working overtime
C．small companies need more hard copies D．they see a growing market for printers
[分析]题干中的HP Company(这家公司在打印机和电脑厂商里也可算是闻名遐迩了)是对我们寻找答案极为有用的线索，循此很快可以找到第3段里，该公司develop new technologies的原因(也是目的)在于：enable people to print even more．．．．本段结尾则一语道破：As the company sees it，the more use of the Internet the greater demand for printers．显然只是要让人们更多地打印，牟利之心昭然若揭，其技术发展的原因与环保无关(排除A项)；与超时办公也无直接逻辑联系(排除B项)；对于hard copies有需求的也不仅仅是small companies(排除C项)；本题正确答案为D．
例3：A visitor visits an island where two tribes live. One tribe always tells the truth and the other always lies. The truth tellers live on the western side of the island, and those who lie live on the eastern side. The visitor wants to determine whether the native beside him is a truth teller or not by asking only one question. He asks the native,” Go and ask the native in the distance which side of the island he lives on.” When the messenger returns, he says, "He said he lives on the western side of the island."Is the messenger a truth teller or not? How can the visitor be sure??
⑦According to the messenger’s answer, the visitor can conclude that_______________?
A. The messenger lives on the western side of the island because he tells the truth.?
B. the messenger lives on the eastern side of the island because his answer may be a lie.
C. it’s hard to determine whether the messenger is a truth teller or not.
D. the messenger probably lives in the western side of the island because his answer may be true.
例4：When the young waitress near my house started saying hello to me every day, I was very happy. She was at least fifteen years younger than I. One day she signed me to come near. When I walked over, she asked,” Are you single?"? “Why, yes." I answered, smiling at her happily.“So is my mother." she said, “Would you like to meet her?"?
⑨The writer talked about the waitress’ age because he thought___________.
A. she was young B. it a pleasure to make friends with her?
C. she was beautiful D. it strange for her to fall in love with him
⑩The waitress said hello to the writer every day because___________.?
A. she lived near his house B. he often went to visit her mother
C. she wanted to be friendly with him D. she loved him very much?