C

A light emitting diode （发光二极管）, or L．E．D．, is a device that shines when electricity passes through it．But it works differently than traditional kinds of light bulbs．Light emitting diodes use less energy and last much longer than bulbs with a filament （灯丝） inside．L．E．                               D．’s are also cooler to the touch, and shine a lot brighter than they used to．  

Red L．E．D．’s have long been used as signal lights on electronic equipment．But now light emitting diodes also come in blue and other colors．Colored L．E．D．’s are used to show images on everything from wireless phones to huge video signs．And white L．E．D．’s are being used increasingly to replace traditional lighting systems．  

But all these require electricity．In poor countries, people often burn fuel to produce light．But the smoke can make people sick．So an electrical engineering professor from Canada started a project to produce L．E．       D．lighting systems for the developing world．These lights are powered by batteries that can be recharged with energy from the sun．The batteries can also be charged through other ways, such as wind power and water power．

Professor David Irvine-Halliday tells the story of how he got the idea．In 1997, while climbing in the Annapurna mountains in Nepal, he saw a small school．All the children were outside．He looked through a window and saw that inside the school was dark．The school had a sign that read: "We have no teachers．If you want to stay and teach for a few days, we would be very pleased．" Professor Irvine-Halliday says that experience had a big effect on him．Back at the University of Calgary, he was on the Internet one day．He saw a company in Japan selling bright white L．E．                           D．’s．So he built a light with some．This is how he began the Light Up the World Foundation．

48．Compared with traditional kinds of light bulbs, L．E．D．’S________．

A．waste a lot of energy                    B．need shorter time to make

C．shine much brighter                 D．are warmer to touch

49．According to the passage, we know that L．E．D．’s________．

A．will replace all the lights            B．will be more and more popular

C．will be only colored ones               D．will be only used in developing countries

50．According to the passage, we can infer that the purpose of the Light Up the World Foundation is to________．

A．develop L．E．D．lighting system for the developing world                   

B．sell bright white L．E．D．’s

C．collect money for developing countries                                        

D．earn money by selling L．E．D．’s

在某访谈节目中，五位嘉宾分别回答了来自主持人的五个问题，对少年儿童提出建议。请从下列提问（A, B, C, D, E和F）中选出与嘉宾的回答相匹配的问题。

Questions:

A．Whatwouldyousaytoteenswhoaresufferingfromdepression?   B．Doyouhaveanysuggestionsforsomeoneinterestedinyourjob?

C．Doyouhaveanysolutionsforteens’writingdifficulty?

D．What advice can you give a young person on how to be a filmmaker or a writer?   

E. Do you have any advice to offer others wishing to become a writer and doctor? 

F. After all these years in the limelight, how do you deal with critics?

1._________________________________________

George Lucas’ answer 

Well, I would say you have to be persistent first of all, because it’s a very hard thing to get into, and it’s very hard to make it because the odds are against you. So you have to really love it; kids who get into it because they think they’re going to make a lot of money or be famous or tell a lot of people what to do all the time will never make it. But if you’re obsessed with film and you love to tell stories and you love writing in that medium, then that will give you the strength to be persistent and make it happen.

2. _________________________________________

Tom Fontana’s answer

I’ve never had writer’s block. I’m trying my luck because I’m hoping never to have it. As far as suggestions, I don’t know. If you write at the same time every day, your brain and your heart will be there, ready to go to work. It’s like how you eat at the same time over the course of the day – you should be available to write at the same time every day. If you have nothing to write, you should still write. Whether you write your name 100 times or describe a banana. If you write for five minutes, and you just get the words down, at least you’re doing something.

3. _________________________________________

Drew Barrymore’s answer

I would just say to persevere and find people who are safe and honest and who will give you tough love and guide you through, because you really can’t do everything on your own. You need love and support around you, and to believe that you will get past these hard times. You will overcome. Things will get better. Life is a series of ups and downs, and the good news is that when you’re in a low, it will always go up again. Life is not a free journey. There are a lot of lessons you have to learn along the way, but just appreciate the gift of it and find people who will be honest with you.

4. _________________________________________

Richard Seltzer’s answer 

Become a doctor first because a writer doesn’t make a living – you have to support yourself and your family. But writing is a very individual thing. It’s like your fingerprint – on one else has exactly your style. A lucky writer will discover his or her style but an unlucky one will always be trying to force himself into an unnatural writing style. It’s uncomfortable, and for them, writing is painful. I’ve never suffered. My life has been a series of small, everyday events. If I feel I have rendered on little bit of life in the most compelling language I can find and am satisfied with it, that is an event I cherish.

5. _________________________________________

Ms. Jamie Hobart’s answer 

It is a long road after medical school and internship but my job is different every day and very interesting. Not everyone can do this job. Autopsies are very different from any other medical job. Here we don't really let anyone under 18 watch or participate in an autopsy. So take a basic anatomy course in college and if you don't mind the cadavers, then you might follow it further. You have to have a very strong stomach and a strong interest in the science. If you decide you really like forensics (the work of scientists who examine evidence in order to help the police solve crimes) but don’t want to do autopsies there are lots of other things in the forensic field like the DNA labor various evidence – related specialties.

Many cities have subways and underground public transportation to take locals and tourists alike rapidly around the city．However, there’s something different about riding a London subway．It may not look different, but the historical value of one of England’s most popular forms of transportation is enough to make riding the subway a must when visiting London．With a little under 300 different stations, the subway can take you almost anywhere you need to go．

Riding a London subway, a person from other countries will notice one major difference: in London, people do not look at each other．In fact, eye contact is avoided at all times．That’s not rudeness ―people are just too busy to bother looking．

Busy doing what, you ask? Well, they’re certainly not using the time for a moment of quiet thinking．Nor are they reading a book．New technology has replaced quiet habits．Today the only acceptable form of book on the London underground is an e-book．

Apple must earn a fortune from London commuters（使用月票上下班者）．Since the launch of the iPhone in 2007, over 40,000―yes, that’s 40,000 “apps” have been designed．

Commuters love them because they are the perfect time-fillers．One “app”, called iShoot, is a game that features tanks．Another one, Tube Exits, tells passengers where to sit on the train to be closest to the exit of their destination．iSteam clouds the iPhone screen when you breathe into the microphone．You can then write in the “steam” on your phone screen．

For those without an iPhone, another Apple product, the iPod, may be the distraction（消遣）of choice．It’s not just teenagers who “plug in” to their music－iPods are a popular way to pass the time for all ages．

And if games, e-books and music aren’t enough to keep you occupied, then perhaps you would prefer a film? The development of palm DVD technology means many commuters watch their favorite TV shows or films on the way to work．With all these distractions, it’s amazing that people still remember to get off the train．

1.Those who want to save time to reach where they go can download ______ to their iPhones．

A．iShoot             B．Tube Exits      C. iSteam      D．iPod

2.People in London do not make eye contact on the subway because ______

A.they are going to work and have no time to communicate with each other

B.they love reading books and do not want to be disturbed

C.they feel sleepy because of getting up early

D.they are busy playing games, reading e-books, listening to music or watching films

3.The underlined word “apps” in the fourth paragraph means ______．

A．computers                 B．programs downloaded for the iPhone

C．computer companies     D．fortune from London commuters

4.Which word best describes the writer’s attitude towards commuters’ behaviors?

A．for             B．against             C．neutral    　    D．hateful

5.The main idea of the passage is that ______．

A．London commuters are unfriendly to strangers

B．Apple has earned a lot of money from selling 40,000 apps

C．technology is changing how London commuters spend their traveling time

D．riding a London subway is a must when visiting London