M: Ok. The red one is only $ 11, and the green one is $ 15. What was said before this conversation?
Ans: W: I'd like to change this red table cloth with the green one.

M: I'm pleased to hear that. W: But I have to say goodbye right now. M: Why? It's not late. Can't you stay a little longer? W: No, I'm sorry, but I really must go. I don't know whether I can catch the last bus if I don't hurry now. M: When does the bus go? W: At ten o'clock. Oh dear! It's already a quarter past ten. M: Don't worry, Kate. Since you have missed the bus, it is unnecessary for you to hurry. I can drive you home. W: Thank you. You are so kind. But my mother will worry about me if I'm too late getting home. I must get home before 11:00. M: That's all right. Let's go now. But I hope to have a chance to see you again. W: Thank you, John. What was said before this conversation?
Ans: W: Well, you know I had a good time tonight.

M: What's wrong, Maggie? W: I have to make dinner for my family. My mother is sick. What was said before this conversation?
Ans: W: Tom, I can't go to the cinema with you today.

W: Sure. I need to return some books. They are due today. Besides, I can also read some weekly publications, magazines and newspapers. M: Great. We can go to the swimming pool in the gymnasium after that. W: Sounds a good idea. Summer is approaching. Today's temperature has reached 35 degree Centigrade. Are you good at swimming? M: Well, that's a good question. I haven't swum for almost two years. I think I need more practice. W: Oh, it's almost 9. I need to hurry. I am running late now. See you after class at the gate of the library then. Bye! M: See you then. What was said before this conversation?
Ans: M: Hi, Jenny. We will have our midterm exams next month. I plan to look for some important books and study at the library. Do you want to join me?