1. B.The test driver made a wrong judgement
2. D.They have generally done quite well
3. A.He works at a national park
4. B.They were making a lot of noise
5. A.The discovery of a new species of snake
6. C.A snake crawled onto his head in his sleep
7. D.From its colour
8. C.His flight is leaving in less than 2 hours
9. B.By credit card
10. A.Give him a receipt
11. D.Posting a comment on the hotel's webpage
12. C.He has stopped making terrible faces
13. D.Warn him of danger by making up a story
14. A.They could break people's legs
15. B.One would have to shave their head to remove a bat in their hair
16. A.Everything seemed to be changing.
17. B.Meeting people.
18. C.He was a young student in the 1960s.
19. A.They avoid looking at them.
20. D.It focus its eye on their mouths.
21. C.By taking in their facial expressions as a whole.
22. C.They resort to different means to survive the bitter cold.
23. B.They consume the energy stored before the long sleep.
24. D.By storing enough food beforehand
25. A.To stay safe
n. 环境,外界