"Can I stay home from school today? I'm ill," he tells his mum. His mother touches  his head. "OK, but you will have to look after yourself. I am going to work now," she says. After the front door closes, Jack springs out of bed. He takes off  the three warm sweaters he is wearing and puts on a T-shirt and shorts. Then he runs for the kitchen . He is very hungry. After breakfast, Jack turns on the TV. He watches some cartoons and a VCD all the morning. At eleven he calls his friend Tom, who is "ill" too. Tom says he will come over after lunch. The two boys play computer games all the afternoon. Tom has to leave at 4 o'clock, as his mother usually gets home early. Next day, Jack says he feels much better and goes to school. Their Maths teacher Miss Clark says with a smile, "We are having the Maths test  now, class. Too many students were at home yesterday." Jack doesn't go to school today because   _  .
he wants to stay at home he wants to watch TV he is ill he doesn't want to have a Maths test