Ⅴ. Complete the dialogue.（补全对话。）
根据下面的对话情景，在空白处填入一个适当的句子，使对话的意思连贯、完整。
(Sun Ming is seeing a doctor. )
Dr Li: Hi, young man! 1.
Sun Ming: I'm not feeling well. I have a headache and feel tired.
Dr Li: Let me see. Oh, you have such a high fever.
Sun Ming: Is that serious, Dr Li?
Dr Li: Don't worry. 2.
Sun Ming: A cold? 3.
Dr Li: You should take the medicine twice a day and have a good rest.
Sun Ming: OK. Can I eat ice cream? I love to eat it very much.
Dr Li: 4. It's bad for your health, especially when you are sick.
Sun Ming: OK. Thanks, Dr Li.
Dr Li: 5. By the way, drink more water, young man.

1. What's the matter with you?/What's the trouble with you?/What's wrong? 2. You just have a cold.
3. What should I do? 4. No, you can't. 5. You're welcome.