听第 9 段材料，回答第 14 至 17 题。

14. How many days will the speakers be in London?

A. A couple of days. B. A week. C. Five days.

15. How would the woman prefer to go to London?

A. By train. B. By car. C. By express bus.

16. What does the man think of taking a train?

A. It’s much quicker.

B. It’s more relaxing.

C. It’s convenient to take their luggage.

17. Which topic do the speakers always disagree on?

A. What luggage they should take.

B. Where to spend their holiday.

C. How to get to a place.

听第 10 段材料，回答第 18 至 20 题。

18. Why can’t scientists find a cure for the common cold?

A. They don’t think it necessary.

B. They have no money for the research.

C. They don’t know exactly which virus causes the cold.

19. How does your body work to get rid of a cold?

A. Your temperature rises.

B. Your blood pressur