17. When did people begin to take part in adventure racing in large numbers?

　A. About 100 years ago. B. In the late 1970s. C. In the early 1990s.

18. What makes an adventure race more challenging?

　A. The combination with different activities.

　B. The area it goes through.

　C. The long distance.

19. How long does it take to do the South Island race?

　A. One day. B. Three days. C. Ten days.

20. What's the most difficult in long races according to the speaker?

　A. Staying awake. B. Saving food and drinks. C. Carrying all the needed things.

第二部分：英语知识运用 (共两节，满分35分)

第一节 单项填空（共15小题；每小题1分，满分15分）

21. As young people, we should always take the lead ______ the call of the government.

　　A. in addition to B.in return to C. in response to D. in honour of

22. ---How do you find your new boss, you guys?

　　---Oh, I think he has earned our wide respect ________ he treats everyone fairly.

　　A. in that B. so that C. even though D. as though

23. The Hong Kong-Zhuhai-Macau Bridge (HZMB), is a 55-kilometre bridge-tunnel system ______ of cable-stayed bridges, an undersea tunnel, and four artificial islands.

A. consisted B. having consisted C. consisting D. being