听力原文：M: How do you usually keep in touch with your friends, Sally? W: I usually give them a call or send them a short message by my cellphone. Sometimes I send them an e-mail. M: So do I. Cellphones are the most popular means in today's communication. Forty or fifty years ago, however, letters were widely used around the world. W: That's it. My grandfather sent 100 letters back when he studied in England from 1950 to 1952. M: Things have changed so much! Have you seen that there is a kind of telephone which is called videophone, with which you can see the person you are talking to? W: Yes, I have. That is wonderful. M: This is the advantage of modern life. Don't you think so? 8. How does Sally usually keep in touch with her friends? (13)