单选题The old man said that the city ______ much since he came here. A. changed B. has changed C. is changing D. had changed

单选题The government's new cyber-security officials yesterday asked telecommunications companies for help in building at government computer network that would have "no risk of outside penetration" — a task some computer security consultants say is nearly impossible. Plans for the private network, called Govnet, hinge on whether a reliable network infrastructure can be built at an affordable price, officials said. Computer system consultants said they could not estimate how much the network would cost because of the government's enormous size and security needs. Richard Clarke, who was appointed special adviser to the president for cyberspace security this week, said he believes a more reliable system can be built. Ninety percent of available fiber-optic space is unused and fairly inexpensive to obtain, he said. Govnet is part of a plan Clarke announced earlier this week "to secure our cyberspace from a range of possible threats, from hackers to criminals to terrorist groups, to foreign nations, which might use cyber-war against us in the future". Govnet would be completely independent from the Internet to help keep out hackers and viruses, according to the government's plan. The request from the General Services Administration asks that telecommunications companies submit proposals about how the network could be built, how much it would cost, and how long it would take to construct. This year, the current network has been breached by hackers, computer worms and viruses. The system was also roughed up by the "Code Red" computer worm and an attack program called "I Love You". The viruses affected thousands of government computers. Last year a report by the General Accounting Office, an internal government watchdog, found weaknesses in the computer network that could allow terrorists or hackers to "severely damage or disrupt national defense or vital public operations or steal sensitive data". Clarke said the government's current virtual private network is vulnerable to viruses and denial of service attacks that Govnet would make more difficult to execute. An internal network, such as the Govnet proposal, is worth investigating but will probably fall to sophisticated hackers, said Amit Yoran, chief executive of the security-services company Riptech Inc. and a former information-security program director at the Defense Department. "It is probably more feasible to implement and strongly enforce global security postures and practices rather than go out and purchase new assets," Yoran said. "Once someone is able to get in, they will find a weak link. When you have a network the size of the government's there will be weak links. Someone will get in./

单选题{{B}}SECTION A CONVERSATIONS{{/B}} {{I}} In this section you will hear several conversations. Listen carefully and then answer the questions that follow.{{/I}} {{I}} Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation.{{/I}}

单选题Which of the following italicized phrases indicates PURPOSE?

单选题Researchers______ that genes may determine the strength of the immune system which could help explain how an infectious disease could have a hereditary link. A. speculate B. estimate C. evaluate D. anticipate

单选题Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.

单选题His plan is carefully prepared and full of details, so it is a very ______ one.A. elaborateB. refinedC. ambitiousD. complex

单选题If only I ______ how to operate a computer. A. learned B. have learned C. would learn D. had learned

单选题{{I}} Questions 24 and 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.{{/I}}

单选题{{I}} Questions 27 to 28 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news.{{/I}}

单选题Sense and Sensibility is a good movie by any standard; ______ it should rank high on any list of romance. A. consistently B. consequently C. invariably D. subsequently

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单选题The author believes that our knowledge of social systems is more secure than that of physical system because ______.

单选题Which one might be true according to what you hear?

单选题In "We listened eagerly, for he brought news of our families", "for" is used to indicate ______.

单选题Which of the following is mentioned in the passage ?

单选题 Questions 24 and 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.

单选题 Until I took Dr Offutt's class in DeMatha High school, I was an underachieving student, but I left that class{{U}} (31) {{/U}}never to underachieve again. He not only taught me to think, he convinced me,{{U}} (32) {{/U}}by example as words that it was my moral{{U}} (33) {{/U}}to do so and to serve others. {{U}} (34) {{/U}}of us could know how our relationship would{{U}} (35) {{/U}}over the years. When I came back to DeMatha to teach English, I worked for Dr. Offutt, the department chairman. My discussion with him were like graduate seminars in adolescent{{U}} (36) {{/U}}, classroom management and school leadership. After several years, I was{{U}} (37) {{/U}}department chairman, and our relationship{{U}} (38) {{/U}}again. I thought that it might be{{U}} (39) {{/U}}chairing the department, since all of my{{U}} (40) {{/U}}English teachers were{{U}} (42) {{/U}}there, but Dr. Offutt supported me{{U}} (41) {{/U}}. He knew when to give me advice{{U}} (43) {{/U}}curriculum, texts and personnel, and when to let me{{U}} (44) {{/U}}my own course. In 1997, I needed his{{U}} (45) {{/U}}about leaving DeMatha to become principal at another school.{{U}} (46) {{/U}}he had asked me to stay at DeMatha, I might have.{{U}} (47) {{/U}}, he encouraged me to seize the opportunity. Five years ago, I became the principal of DeMatha.{{U}} (48) {{/U}}, Dr. Offutt was there for me, letting me know that I could{{U}} (49) {{/U}}him. I have learned from him that great teachers have an inexhaustible{{U}} (50) {{/U}}of lessons to teach.

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