When you think about math, you probably don’t think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.

People who solve crimes look for patterns that might reveal(揭示) the identity of the criminal. It’s long been believed, for example, that criminals will break the law closer to where they live, simply because it’s easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect(嫌疑犯) who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.

But Mike O’Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal’s home base by combining these patterns with a city’s layout(布局) and historical crime records.

The records of past crimes contain geographical information and can reveal easy targets — that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O’Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal’s patterns change with age. It’s been shown, for example, that the younger the criminal, the closer to home the crime.

Other computer programmers have worked on similar software, but O’Leary’s uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.

The program is just one way to use math to fight crime. O’Leary says that criminology — the study of crime and criminals — contains a lot of good math problems. “I feel like I’m in a gold mine and I’m the only one who knows what gold looks like,” he says. “It’s a lot of fun.”

1.

 To find criminals, police usually ______.

A. focus on where crimes take place      B. seek help from local people

C. depend on new mathematical tools      D. check who are on the crime scene

2.

O’Leary is writing a computer program that ______.

A. uses math to increase the speed of calculation

B. tells the identity of a criminal in a certain area

C. shows changes in criminals’ patterns

D. provides the crime records of a given city

3.

 By “I’m the only one who knows what gold looks like”, O’Leary means that he ______.

A. is better at finding gold than others

B. is the only one who uses math to make money

C. knows more criminals than other mathematicians

D. knows best how to use math to help solve crimes

4.

What is the main idea of the text?

A. Criminals live near where crimes occur.

B. Math could help police find criminals.

C. Crime records could be used to fight crime.

D. Computer software works in preventing crimes.

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
W: Hello, may I speak to Mr. Black, please?
M: Speaking.  【小题1】 
W: This is the Town Job Center. We have received your Email  【小题2】 .
M: Can you tell me more about it? What kind of jobs? Where?
W:  【小题3】  It’s the kind of job you would like to do, as we can see from your Email.
M: Yes, I did put that in my Email.
W: Yes. They also want a person who knows how to operate computer,  【小题4】 .
M: What about the pay and the work hours?
W: I am coming to that. The pay they have offered is satisfactory,  【小题5】. Sometime early in the                  morning, sometimes late in the afternoon.
M: Well, I am interested in it, but I need some more details so that I can talk it over with my wife.
W: Why don’t you come over here tomorrow?
M: OK, I’ll do that. See you tomorrow then. Bye!

The following words were written on the tomb of an Anglican Bishop(主教) in the Crypts of Westminster Abbey(西敏寺):

When I was young and free and my__1.__(imagine) had no limits, I dreamed of changing the world.__ 2.__ I grew older and wiser, I discovered the world would not change, so I __3.__ (short) my sights somewhat and decided to change only my country. But _4.__， too, seemed immovable.

As I grew _5.__ my twilight years (晚年), in one last desperate attempt, I settled for changing only my family，those __6.__(close) to me, _7._alas, they would have _8.__ of it.And now as I lie on my deathbed, I suddenly realize: If I had only changed myself first, then by example I __9._ (change) my family.

From their inspiration and encouragement, I would then have been able __10._(better) my country and, who knows, I may have even changed the world.

Life is too short to waste a moment, so while you still have time, let your hair down, remove that “boring” tag in your so-called life and start making it worthwhile. Below are some tips that will help you live a wonderful life.
1. Keep a Positive Attitude. Enjoy what you have and work on getting the things you desire. Psychologists believe that optimism (乐观主义) is a good defense against unhappiness, so it is better to keep your optimism alive. Feeling sad about your life will only make you sadder, so be happy.
2. Don’t Be Afraid to Take Risks. Life is all about taking risks, and that’s the exciting part of it. Challenges and failure are part of life. Once you learn how to take risks, you’ll soon realize how good it feels not to let moments pass you by.
3. ... You only have one life, so make it worthwhile. Being unwilling to let the past go just keeps you away from the things you should be enjoying at the present.
4. List the Things You Want to Do. Stop lazing around and give yourself something to be busy with. Write down a list of all the things you want to do and make a timeline, not to stress you out, but to remind you of your goals. So don’t put limits to yourself because you’ll never know what may happen.]
5. Try Out Something New. Getting into something or trying something unfamiliar to you may seem scary, but nothing can make you feel happier than being able to overcome your fear. Who knows? You might enjoy it! The world is a big place and there are still lots of things waiting to be explored by you. Go to a foreign place where you know no one.
【小题1】 From Tip One we know that we should             .

A．feeling sad about your life does you no good

B．it’s good to keep yourself busy doing something

C．you shouldn’t go to a new place where you have no friends

D．you should enjoy the present instead of always thinking of the past

I remember the first time that I was extremely happy. I was about 8 years old when for the first time, there was a computer in the classroom. I remember that my teacher allowed each student to take turns playing various educational games on the computer. One day, I found the source code (密码) for one of these games. Without knowing or being taught any programming language, I was able to figure out some portions of the BASIC code.
Anyone who knows a bit of programming can tell you that I just give myself an infinite (无穷大) number of lives in the game, so I can continue playing forever. This was also my first introduction to algebra (代数), and I didn’t even know it at the time. This was a decisive (决定性的) moment in my life. For the first time that I can remember, I was quite happy because of what I was learning and what I was able to do. As a result, I became enthusiastic for the rest of my life about self-learning and computers, and I was quite happy doing them, too.
I’ve noticed that people who are truly content with life are enthusiastic in what they do. This enthusiasm, along with good health, is the key to being happy. It also leads to self-confidence and fulfillment in life, too. It may also lead to success, wealth, and achievements.
Yes, success, wealth, or achievements seem to bring some people happiness, too. Yet, I don’t think they can indeed make people happy. I know plenty of people who are successful and wealthy. However, I also know several of the people with successful businesses are not happy with what they are doing. I know people who continuously buy themselves new toys, cars, computers, and televisions, yet they never seem content for too long.
Please remember that happiness comes from enthusiasm, and happiness is the journey of life, not the destination.
【小题1】What did the writer’s teacher ask the students to do on the computer?