Questions 19 to 21 are based on the conversation you have just heard.
19. A) To test how responsive dolphins are to various signals.
B) To find out if the female dolphin is cleverer than the male one.
C) To see if dolphins can learn to communicate with each other.
D) To examine how long it takes dolphins to acquire a skill.
20. A) Produce the appropriate sound.
B) Press the right-hand lever first.
C) Raise their heads above the water.
D) Swim straight into the same tank.

21. A) Only one dolphin was able to see the light.
B) The male dolphin received more rewards.
C) Both dolphins were put in the same tank.
D) The lever was beyond the dolphins’ reach.

Questions 22 to 25 are based on the conversation you have just heard.
22. A) In a botanical garden.
B) In a lecture room.
C) In a resort town.
D) On a cattle farm.

23. A) It is an ideal place for people to retire to.
B) It is at the centre of the fashion industry.
C) It remains very attractive with its mineral waters.
D) It has kept many traditions from Victorian times.

24. A) It was named after a land owner in the old days.
B) It is located in the eastern part of Harrogate.
C) It is protected as parkland by a special law.考試網(wǎng)
D) It will be used as a centre for athletic training.

25. A) The beautiful flowers.
B) The refreshing air.
C) The mineral waters.
D) The vast grassland.