1 Computers are used in a lot of schools.
2 CDs are made of plastic.
3 The information can be seen on a screen.
4 The answers are very quickly calculated.
5 The game is played on a computer.
6 E-mails are sent with a modem.
7 Information is stored on a disc.
8 Text messages are sent using mobile phones.
9 The Internet is used to get information.