Imagine the situation. You are driving along a desert or on a mountain. You have no idea where you are. You passed the last hour two hours ago. Then your car breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a GPS with you. This invention may be able to help you. It is a device(装置)which uses satellites to find the user’s position. It can find your position to within 20 meters. A GPS can’t start your car, but at least you will know where you are.

GPS, which means Global Positioning System, is a small radio receiver. It looks like a mobile phone. You can hold it in your hand, or put in your pocket. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes or boats. Some of these devices have electronic maps, so you know where you are. For example, in a city they can tell you the name of the street.

There are three parts to the Global Positioning System. The first part is the receiver . You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting the Earth. The receiver contacts at least four of the satellites and calculates its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.

Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more accurate(精确). There are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.

1.According to the passage, with the help of the GPS, people ___________________.

A. can’t be lost in a new city

B. can’t find their way in different countries.

C. can learn about the culture of an unknown place.

D. can spend the least time getting to another place.

2.We can learn from the passage that ______________________________________.

A. there are three parts to the GPS.

B. a GPS can’t be put into a watch.

C. a GPS can help you start your car.

D. a GPS are becoming more and more expensive.

3.The underlined word “ they” in paragraph 3 means “_________________________.”

A. Receivers B. GPS devices

C. Satellites D. Ground Station

4.The passage is mainly about ____________________________________________.

A. the history of the GPS

B. the introduction of the GPS

C. the shape of the GPS

D. the three parts of the GPS

5.What can you infer from the passage?

A. All GPS devices have electronic maps.

B. People in many countries will use the GPS for free.

C. The receiver of the GPS contacts at least five of the satellites.

D. The GPS will become more and more common in everyday life.

Some children wish to be writers when they grow up. They mean that they want to write stories or books. They would be happy if many people read their stories or books some day. But I would like to tell these children that they will need to be good readers and read a lot before they become good writers. Nearly all great writers listened to others tell stories long before they started school. They also kept on reading for hours and hours for years. Even when they have become writers, they spend much of their time reading books instead of watching TV in the evening.

If you are a good reader, it won’t take you long to do the reading homework your teacher ask you to do. Then you will have time to read other books for fun. You read so well that you always want to look for more books to read.

If you want to be a writer, reading is very important. When you decide to become a writer, you had better tell yourself, “I must read more and more if I really want to become a good writer.”

1. Some children want to be writers because they _________.

A. want to make money

B. want to practise their handwriting

C. like reading books

D. want people to read their books

2.Many great writers _________ before they became writers.

A. watched TV every day B. were good at telling stories

C. read a lot D. learned from some famous teachers

3.If you are good at reading, __________.

A. your reading homework will be easier for you

B. you will spend a lot of time on your homework

C. your teacher will ask you to read more

D. your school will offer you more books

4.From this passage, we can know that ________.

A. children like reading

B. reading helps to make one a good writer

C. good readers are good writers

D. it’s good to be a good writer.

5.Which is the best title(题目) of this passage?

A. Great writers B. How to become a writer

C. How to be a good reader D. Books and stories

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