B) To save energy.

C) To keep company.

D) To protect the young

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

听力训练的目标是努力听懂能读得懂的东西，听懂该听懂的，对于读不懂的东西，只能通过提高词汇量来解决哦。