Unit 1

Daming:What do you think, Betty? Which of these inventions is the most important?

Betty:It’s difficult to say.They’ve all changed people’s lives.

Lingling:I love my mobile phone because I can use it anywhere.It’s so useful.

Daming:Yes, all my friends’ numbers are kept in my phone, so I don’t need a notebook.

Betty:Today’s cameras are better than old cameras because they don’t need film.

Daming:Yes, and the photos can be sent by email.

Lingling:Well, I think everything was changed by computers to some degree, so I think the computer is the most important invention.

Daming:I agree.I can’t imagine living without one.