1. Let's walk to the park. A. All right. B. I think so. C. I'm sorry. 2. When did you arrive ? A. Tomorrow. B. Yesterday. C. For two days. 3. Shall I open the window ? A. Yes, I shall. B. Yes, you will. C. Yes, please. 4. I got a letter from Paul this morning. A. I'm afraid not. B. That's nice. C. He's fine. 5. How's your sister ? A. She' s Jane. B. She's at school. C. She's very well.