2018年6月英语四级听力长对话4大设题点2017-12-25 16:45 来源：新东方在线
例1：What is the purpose of Doctor Jarvis Bastian’s experiment?
A) To test how responsive dolphins are to various signals.
B) To examine how long it takes dolphins to acquire a skill.
C) To find out if the female dolphin is cleverer than the male one.
D) To see if dolphins can learn to communicate with each other.
原文: W: One of the most interesting experiments with dolphins must be one done by Doctor Jarvis Bastian. What he tried to do was to teach a male dolphin called Bass and a female called Doris to communicate with each other across a solid barrier.
例2：What were the dolphins supposed to do when they saw the steady light?
A) Press the right-hand lever first. C) Raise their heads above the water.
B) Produce the appropriate sound. D) Swim straight into the same tank.
原文：W: Well, first of all, he kept the two dolphins together in the same tank and taught them to press levers whenever they saw a light. The levers were fitted to the side of the tank next to each other. If the light flashed on and off several times, the dolphins were supposed to press the left-hand lever followed by the right-hand one. If the light was kept steady, the dolphins were supposed to press the levers in reverse order. Whenever they responded correctly, they were rewarded with fish.
例3：How did the second stage of the experiment differ from the first stage?
A) Both dolphins were put in the same tank. C) Only one dolphin was able to see the light.
B) The male dolphin received more rewards. D) The lever was beyond the dolphins’ reach.
原文：W: Well, that was the first stage. In the second stage, Doctor Bastian separated the dolphins into two tanks. They could still hear one another, but they couldn’t actually see each other. The levers and light were set up in exactly the same way except that this time it was only Doris who could see the light indicating which lever to press first. But in order to get their fish, both dolphins had to press the levers in the correct order. This meant of course that Doris had to tell Bass whether it was a flashing light or whether it was a steady light.