Directions: There are 6 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice and write your answer on the Answer Sheet. =9ISsI\Y6
One day in 1963, a dolphin named Elvar and a famous astronomer, Carl Sagan, were playing a little game. The astronomer was visiting an institute which was looking into the way dolphins communicate with each other. He was standing at the edge of one of the tanks where several of these highly intelligent, friendly creatures were kept. Elvar had just swum up alongside hiui,and had turned on his back. He wanted Sagan to scratch his stomach again, as the astronomer had done twice before. But this time Elvar was too deep in the water for Sagan to reach him. Elvar looked up at Sagan, waiting. Then, after a minute or so, the dolphin leapt up through the water into the air and made a sound just like the word `More?' " %)zT H
The astonished astronomer went -to the director of the institute and told him about the incident.
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`Oh, yes: That's one of the words he knows,' the director said, showing no surprise at all. `II/nv0jn
Dolphins have bigger brains in proportion to their body size than humans have, andit has been known for a long time that they can make a number o
