2. How useful is his invention to human society?

After a few minute

T: Now who'd like to show your answers?

S1: Let me try. I know Alexander Graham Bell was born in Scotland and he was very curious about the world around him when very young. He did many tests to improve what he had invented and he had made many other inventions in his life. As we all know, it is very convenient for people to communicate with each other through telephones. Its is certainly true that telephones have become part of our everyday life. Living in this "information age", we cannot bear a world without the riming of phones almost anywhere.

S2: I think Bell was a very great inventor. He deeply loved his mother who was almost deaf and was determined to do something for the disabled to live a better life. What a great son! I think he was also hardworking because he took a lot of trouble doing may experiments to solve the problems and invented a lot of things. I can't imagine what the life would be like without telephones. Maybe we will live in a silent world without knowing of the things around us, which is unbearable for us human beings in modern society. And it becomes more and more important to use telephones to receive and send information with the development of modern IT.

...

Step III Listening & Reading

Let the Ss read the four questions first to get general idea of what should be paid attention to and then play the tape for Ss to follow. When they finish, let them exchange notes with their partners and find the supporting sentences. Then check the answer with the whole class.

T: Now please read the first sentence of each paragraph and the key words in bold and then tell me the main ideas of it.

（After a few minutes）.

S: It mainly talks about the life of Alexander Graham Bell and how he made the great inventions.

T: Very good! Next please go through the four questions on page 26 and find the anser after listening.

Ask the Ss to listen to the recording and try to answer the questions.

Sample answers:

1. Because of curiosity, he became interested in helping deaf people communicate and then he began to explore around problems that led to his most famous invention. He had a flash inspiration when he noticed that the straw drew sound wave on a piece of smoked glass, and then he did many experiments to improve the telegraph until at last he invented the first telephone.

2. He thought the key to his success was his curiosity and great efforts.

3. Besides the telephone, Bell also experimented with helicopter designs and flying machines. When experimenting putting triangles together, he discovered the tetrahedron shape, which has proved very valuable in design of bridges.

4. Because the inventions of the telephone is more important and useful in