13.He hardly ever leaves the house after ten at night，( )?

3. Passage 20 Clifford Stoll ran a computer system in Berkelely， California. As a system administrator， he kept a close eye on the records. One day， Stoll found something strange in the payment record. There was a 75 cents mistake. One of the thousands of users had used the system for 75 worth of time and not paid for it. It might sound like very little money to worry about. But that 75 cents was the first clue Stoll had to a much bigger problem — that a hacker(黑客)had broken into Stoll‘s computer system. Who was it? Stoll spent the next year trying to find out. During that time the hacker used the system in Berkelely as a starting point to break into military computer systems all over the United States. Stoll had to keep track of the hacker‘s activities on the computer without the hacker‘s knowing someone was watching him. Stoll even made up huge files of false information so the hacker would have lots to read. When the hacker spent long time reading， the telephone company was able to trace the lines. After a year， the hacker was traced back to his computer — in Germany. He was later caught by the German police. Stoll was concerned about a 75 cents mistake because( ).

A. 　every cent was important to the company

B. 　it might lead to a greater loss for the company

C. 　he was afraid the computer system might break down some day

D. 　he realized someone had broken into the computer system

107.( )， I will stick to my dream.

A. 　Somehow

B. 　 Anyhow

C. 　 Somewhat

D. 　 Anywhere

46.Unemployment has come down slightly， but this does not( )the fact that it is still a major problem.

A. 　cite

B. 　 confirm

C. 　 alter

D. 　 replace

4. Passage 15 There is a commonly held myth that Einstein was an underachiever at school， but it really isn＇t true. While he may have had difficulties with languages， Einstein excelled in physics， mathematics and music. Einstein held many patents and was a keen inventor. While working at Swiss patent office in Bern he took it upon himself to write his own scientific papers in his spare time， mostly at weekends and in the evenings after work. 1905 was Einstein＇s miracle year. During this year he wrote three fundamental papers， any of which would have guaranteed him immortality in the world of physics. His first was on a new understanding of the structure of light. Einstein argued that light is composed of small particles of energy， called photons， as well as oscillating waves. The second paper built upon the theory of kinetics. Einstein explained how atoms were responsible for the buffeting of particles of material in suspension， like cigarette smoke suspended in air. This paper presented the first direct evidence for the existence of atoms， vindicating an idea that had been around for over 2000 years. His third paper of 1905 was ―On the Electrodynamics of Moving Bodies‖. Here Einstein derived the theory of ―special relativity‖. In a supplementary paper four months later， he formulated the famous equation， E=mc2， where mass and energy are equivalent， showing that a very small amount of mass converts to a huge amount of energy. This is the driving force behind atomic bombs， and all the stars in the Universe. Which theory did Einstein put forward in the third paper mentioned above?

A. 　Kinetics.

B. 　 Electrodynamics.

C. 　 Special relativity.

D. 　 Not mentioned.

5. Passage 7 Greek soldiers sent messages by turning their shields toward the sun. The flashes reflected light could be seen several miles away. The enemy did not know what the flashes meant， but other Greek soldiers could understand the message. Roman soldiers in some places built long rows of signal towers. When they had a message to send， the soldiers shouted it from tower to tower. If there were enough towers and soldiers with loud voices， important news could be sent quickly over distance. In Africa， people learn to send messages by beating on a series of large drums. Each drum was kept within hearing distance of the next one. The drum beats were sent out in a special way that all the drummers understood. Though the messages were simple， they could be sent at great speed for hundreds of miles. In the eighteenth century， a French engineer found a new way to send short messages. In this way， a person held a flag in each hand and the arms were moved to various positions representing different letters of the alphabet. It was like spelling out words with flags and arms. Over a long period of time， people sent messages by all these different ways. However， not until the telephone was invented in America in the nineteenth century could people send speeches sounds over a great distance in just a few seconds. Which of the following may be the best title for this passage?

A. 　Shields and Drums

B. 　Audio and Visible Signs

C. 　Ways of Sending Messages over History

D. 　Messages in Different Countries

30.The elephant is the largest land animal( ).

A. 　in practice

B. 　 in existence

C. 　 in turn

D. 　 in common

19.Harry took a taxi to work this morning. He( )a taxi if he had not missed the only bus that passes by his office.

A. 　wouldn‘t have taken

B. 　 wouldn‘t take

C. 　 hadn‘t taken

D. 　 won‘t take

80.I think the scientist isthe high praise that has been given to him.

A. 　worth

B. 　 worthy of

C. 　 worthwhile

D. 　 valuable to

3. Passage 6 Community service is an important component of education here at our university. We encourage all students to volunteer for at least one community activity before they graduate. A new community program called ―One On One‖ helps elementary students who‘ve fallen behind. Your education majors might be especially interested in it because it offers the opportunity to do some teaching， that is， tutoring in Math and English. You‘d have to volunteer two hours a week for one semester. You can choose help a child with Math， English， or both. Half-hour lesson are fine， so you could do a half hour of each subject two days a week. Professor Dodge will act as a mentor to the tutors ---- he‘ll be available to help you with lesson plans or to offer suggestions for activities. He has office hours every Tuesday and Thursday afternoon. You can sign up for the program with him and begin the tutoring next week. I‘m sure you will enjoy this community service and you‘ll gain valuable experience at the same time. It looks good on your resume， too， showing that you‘ve had experience with children and that you care about your community. If you‘d like to sign up， or if you have any questions， stop by Professor Dodge‘s office this week. What does Professor Dodge do?

A. 　He advices students to participate in the special program.

B. 　He teaches part-time in an elementary school.

C. 　He observes elementary school students in the classroom.

D. 　He helps students prepare their resumes.

146.This company is closing up， so lots of workers will be laid( ).

A. 　down

B. 　 out

C. 　 off

D. 　 aside