M:The telephone plays an important part in our daily life today.But do you know who invented it?
W:It was invented by Alexander Bell in 1876.
M:Were people interested in it at the beginning?
W:No.When Bell showed his first telephone at an exhibition, no one seemed interested.It was regarded as a toy.
M:Why did the telephone become famous then?
W:That's because of the Emperor of Brazil.He came to the exhibition and tried the telephone.When he heard the voice on the receiver, he dropped it in surprise and said,“It talks!”
M:I think the emperor made an advertisement for Bell.