Can a fish hear fishermen moving along the stream? What are the facts about the ability of a fish to see? Can they tell the difference between colors?
The sharp hearing of a fish has been proved by two scientists, who trained a fish to expect its food when it heard the sound of a whistle. And a slight sound two hundred feet away could drive fishes away. That should make fishermen start thinking.
One scientist had made experiments to prove fish can recognize different colors such as red, brown, yellow and green.
Fish also have an eye for different shapes. One scientist proved this by teaching fish to connect certain patterns with food. He used a small circle and a square. If the fish swam towards the circle, they received food as a reward. If they swam towards the square, they received nothing. The fish learned in time to go to the circle but not to the square. Does this mean that in time fish might learn to leave alone all food on hooks that they have seen often before? Here is something for all fishermen to think about!
These facts help to make more believable some of the “believe it or not” stories that have been told about fish. It is clear that fish have sometimes shown their ability to gain knowledge as man does. A good example of what we might call “thinking” by a fish is given by an experience of Dr. Andrew Gage. Fishing over a bridge, he hooked a fish. It struggled and dragged the line two hundred feet away before he stopped it. Then it swam back to the bridge. The clever fish then swam round a pile and, with a sudden push, broke the line. If the story ended there, one could say that the fish had freed itself by chance. However, Gage went on fishing. Below him he could see the fish that had broken loose. After another twenty minutes the fish again seized the food on the hook. This time it did not swim out but swam round one of the piles and again broke the line.
Many stories are told of the fish that get away and the clever “old hand” ones that can’t be caught. The more often a fish is nearly caught, the more difficult it will be to interest it next time.
【小题1】The last two paragraph’s mainly discuss .A．whether a fish can think as man doesB．how a fish could escape from dangerC．how to catch a fish more easilyD．whether a fish is believable【小题2】 What’s the best title of the passage?A．Fish can hear and seeB．How clever is a fish?C．Fish can play tricksD．How scientists help fishermen.【小题3】We can infer from the last paragraph that .A．it’s difficult to catch fish;B．fish are cleverer sometimes than fishermenC．fish seem to learn by their experienceD．fewer people will be interested in fishA
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(答案→)A
解析：本文是一篇关于鱼的研究发现。鱼的听觉很敏感。一个科学家通过实验证明：鱼是能辨别不同的颜色。鱼能辨别形状。还有令渔夫们值得思考的问题：鱼能脱钩而逃。种种发现表明：鱼就和人一样聪明。
【小题1】推理判断题。最后两段主要讨论鱼是否有能力和人一样会思考。聪明的鱼会脱钩而逃。第五段第二句：It is clear that fish have sometimes shown their ability to gain knowledge as man does. 很清楚鱼有时会表现出它们和人一样有获取知识的能力。故选A。
【小题2】标题归纳题。本篇文章根据全文内容，尤其是第五段判断：通过该段的鱼脱钩的经历描述和最后一段判断：通过全文阅读判断最佳题目应该是：鱼到底有多么聪明？故选B。
【小题3】推理判断题。根据第四段的故事和全文最后一句话：The more often a fish is nearly caught, the more difficult it will be to interest it next time.鱼越是经常差一点就被捉，下一次就越难使它（对鱼饵）感兴趣。判断鱼似乎是根据经验摆脱鱼钩的。故选C。