Here are the best answers to complete each of the dialogues:

1. A: What an attractive hair style you have got, Mary! B: Thank you very much. I am always careful with my hair.

2. A: I can't thank you for your helpfulness. B: It's my pleasure. I don't mind your asking.

3. A: I am glad that you like my new painting. B: I like it very much. It is really something else.

4. A: You've got a stylish T-shirt, Ben. B: Thank you. I think so too.

5. A: Thank you so much for the nice gift you brought to my birthday party. B: That's all right. I was very pleased to be at your party.

6. A: All right. Do you know how much it is? B: It's about ten bucks.

7. A: It's good. B: Yes. It's half past seven.

8. A: Would you like a glass of wine? B: Yes, please. I prefer a dry one.

9. A: It's a red shirt. B: Yes. It's very comfy. I think it's very cheap.

10. A: I'm afraid so. B: Can you speak English? That's all right.

11. A: What time shall we leave? B: About ten o'clock. The sooner the better. You must be kidding.

12. A: How long does it take you to get to Union Place from your flat? B: About thirty minutes. It takes me about half an hour.

13. A: You find it very interesting to travel abroad. B: Yes, you're welcome. I find it exciting.

14. A: How often do the buses run? B: From the bus stop over there. About fifteen minutes.

15. A: Can you tell me the way to Miller College from your flat? B: Yes. It's not far from here. I know it.

16. A: Would you like to have dinner with me? B: Yes, it is. Yes, I'd love to.

17. A: What time is there a bus? B: A twenty a day. It's seven thirty.

18. A: "How do you do?" B: "How do you do?" I am well, thank you.

19. A: I've already done my homework. B: Have you? Please do it now.

20. A: When did you get back from the nearest post office? B: Can you tell me the way to the nearest post office? It's about two kilometers.

21. A: Can you turn left and then right. B: It's opposite the bank. You can walk or go there by taxi.

22. A: Thank you for being honest to me. B: Congratulations! How wonderful! Never mind.

23. A: Could you open the window, please? B: A fan, of course. It's very warm. Yes, I can.

24. A: I'd like to try on these shoes, please? B: Would you mind going out for dinner next Saturday? (This seems like an incorrect response and doesn't fit the context of trying on shoes. There might be a mistake in the options provided.)