2 . It's not easy to remember your number. That's because China has the longest mobile phone numbers in the world. Why is that?

In China, we have 11 digits which can be divided into three parts. Each part has a different meaning. The first three numbers tell you which mobile phone service provider you are using. The fourth to the seventh digits tell you which region the number is registered (注册) in. And the last four digits are random (随机的).

The main reason for using 11 digits is that we have the largest population in the world. Plus, mobile phone numbers can be recycled. Usually, the service provider will reuse a canceled (注销的) number after three to six months.

Besides China, Britain and Japan also use 11-digit mobile phone numbers. But their numbers always start with 0. So they cannot create as many numbers as we can. Countries like the United States, Australia and India use phone numbers with 10 digits. Canada's mobile phone numbers are perhaps the world's shortest: they use seven digits.

1. In the number of 18837105268, which digits tells you the registered region?

A．188

B．371

C．3710

D．5268

2. What's the main reason for using 11 digits?

A．Because we have the largest phone users in the world.

B．Because we have the largest population in the world.

C．Because we have the phone service provider in the world.

D．Because we have the largest phone numbers in the world.

3. As for a canceled number, what will the phone service provider do?

A．never reuse it	B．use it again at once
C．use it one month later	D．use it three months later

4. Which country uses 11-digit mobile phone numbers?

A．China

B．Britain

C．Japan

D．all of above

5. Which of the following is TRUE according to the passage?

A．7-digit mobile phone numbers may be the shortest worldwide.

B．The United Kingdom uses phone number with 10 digits.

C．Like China, Japan also uses 11-digit mobile phone numbers and always starts with 1.

D．Britain can create as many numbers as Chinese can.

3 . There is a telephone on my desk. It's my good friend. It helps me a lot. My telephone number is 8445816. Sometimes when I have something to talk about with my classmates, I don't need to go out. I call them.1 write down many telephone numbers of my friends. My best friend John's number is 8459471. When I can't remember my homework, I ask him by telephone. There are some telephone messages beside my telephone. When I am out, my mother writes down the messages for me.

1. Where is the telephone?

A．In his office.	B．In his friend's house.
C．In his classroom.	D．On his desk.

2. Whose telephone number is 8445816?

A．John's mother's.	B．The writer's.
C．His classmate's.	D．John's.

3. What time does he call his classmates according to the passage?

A．When he doesn't know how to do his homework.

B．When he doesn't remember the telephone numbers of others.

C．When he can't remember what the homework is.

D．When he doesn't need to go out.

4. Why does his mother write down the message for him? Because______.

A．he isn't out	B．he is working at his lessons
C．he forgets the phone number	D．he isn't in

5. What does he think of the telephone?

A．Useless.	B．A good friend.
C．A good teacher.	D．Helpless.