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.
Tony: Dad, can I borrow your camera?
Tony: I'd like to take some photos on the school visit to the museum next week. They'll be put up on the school website. And they can be seen on the Internet by other classes, even people living in other countries.
Dad: Sounds great! When I was at school, we waited for weeks to hear from our pen friends abroad. But today, we can send and receive photos and mails on the Internet, and it's really fast.
Tony: Yes, the Internet and the computer have changed our lives. We even use online textbooks in our class. I wonder ... Will computers be used more than books in the future?
Dad: Perhaps. In the past, we mainly got information from paper books. Some were huge ones with thousands of pages. Today, with the invention of the computer and electronic technology, it's easy to get information on the Internet. The Internet is more powerful than books.
Tony: Anyway, about the camera ...?
Dad: Oh, yes. Here it is. I haven't used it since your mum's birthday. And the caral memory may be full.
Tony: OK. That can be fixed. I've got an empty memory card. Where are the instructions?
Dad: In the camera bag. It's a gift from your mum for my birthday, so you must promise that you'll take good care of it. If you have to lend it to anyone, tell them to use it properly.