Dưới đây là cách sắp xếp các câu thành đoạn hội thoại hợp lý:

### Đoạn hội thoại 1:
1. a. Nam: Hi, Mark. Long time no see. You look so good.
2. c. Mark: Hi, Nam. Thanks, you look so fit. Have you worked out a lot lately?
3. b. Nam: Yes, I have. I exercise every morning and eat more healthy food.

### Đoạn hội thoại 2:
1. a. Alex: Why online classes?
2. b. Sue: I'm going to try online classes.
3. c. Alex: I think online classes are too expensive. I don't think I'll try them.
4. d. Alex: How are you going to improve English?
5. e. Sue: They improve our communication skills and they have flexible schedules.

Hy vọng điều này hữu ích cho bạn!