Mike has a headache today. He goes to the hospital with his mother. The hospital is near his home. So they go there on foot. The doctor says, "You have a cold. You should have a rest at home. You should drink some warm water and take some medicine." Then Mike goes back home and takes some medicine. He sits on the bed and calls Miss Liu, "Hello, Miss Liu. This is Mike." "Yes, speaking. What's wrong with you, Mike? Are you ill?" Miss Liu asks. Mike answers, "Yes, I have a cold. I can't go to school today." "But it's Saturday, you don't have to go to school today." Miss Liu laughs.