4 Complete the text using the phrases from exercise 3. Using computers is really easy! You can (1) to do almost anything. People use them for work and to play games and scientists use them to (2) A (3) is a set of instructions telling the computer what to do. When you (4) ..., the computer follows the instructions and does what you tell it to, either through the keyboard or by clicking (5) . Now that computers are part of our lives, everybody should learn how to use them! ​

1) Ice melts quickly if you put it in hot water.2) If he were taller, Jane would ask him to dance the mambo with her.3) I won't understand if she speaks Japanese to me.4) If Peter studied harder, he would be a better student.5) If you tell him a joke, John usually laughs for a long time.6) If I had her number, I would call her immediately.7) If you don't help your mum, she won't be very happy.8) If it weren't so cold, I would go out.