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　　After a long period of studies, scientists are uncovering surprising new findings about dolphins(海豚). They believe that dolphins do “talk” to each other, whistling “names” among themselves and others in their group. They help one another when in trouble, like bats, they use sound waves to “see”.

　　Dolphins love to mimic(模仿). If we swim on our backs, they do, too. If we dive, they follow. Once a trainer blew a puff of(一阵) cigarette smoke against the window of an observation tank(箱), a young dolphin suddenly swam to its mother, nursed a moment, and spit out a cloud of milk against the glass.

　　It is even more surprising that that dolphins are able to understand sigh language. One of Herman's dolphins has mastered more than 50 sign words. And they can also mimic the signatures of others. Now scientists are learning how dolphins “speak” to each other.

　　Dolphins help one another. When birth－giving takes place, female gather to keep off sharks. Later, while the mother looks for food, they take care of the young dolphin, swimming in circle.

　　Dolphins reach out to us in astonishing ways. What would the world be like without them?

1．To the best of our knowledge, dolphins are ________.

[　　]

A．surprising fish

B．human man's friends

C．intelligent mammals

D．interesting animals

2．In the second paragraph, “nursed” means ________.

[　　]

A．brought the mother something to eat

B．sucked milk from the mother dolphin

C．asked to be taken care of

D．gave some milk to her

3．What was the dolphin doing when it suddenly swam to its mother? It was ________.

[　　]

A．having a little fun

B．diving into the deep sea

C．playing with the trainer

D．copying “smoking”

4．Which of the following do you think is more reasonable?

[　　]

A．We are in the early stage of learning about the animals.

B．We have little difficulty in understanding dolphins.

C．Man will be able to talk freely to dolphins in the near future.

D．Sign language is the only way to make dolphins understand us.

5．The underline word “they” in the first paragraph refers to ________.

[　　]

Dolphins（海豚）are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this, they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brain is nearly the same size as our own, and they live a long time―at least twenty or thirty years. Like some animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and to help them find food. We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw.
Strangely, dolphins seem to like man, and for thousands of years there have been stories about the dolphin and its friendship with people.
There is a story about sailors in the 19th century. In a dangerous part of the sea off the coast of New Zealand, they learnt to look for a dolphin called Jack. From 1871 to 1903, Jack met every boat in the area and showed it the way. Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack. He recovered and for nine years more continued to guide all ships through the area－except for The Penguin.
Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them.
【小题1】Dolphins are different from many other animals in that they _____.

　　　 Dolphins（海豚）are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this, they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brain is nearly the same size as our own, and they live a long time―at least twenty or thirty years. Like some animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and to help them find food. We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw.

　　　 Strangely, dolphins seem to like man, and for thousands of years there have been stories about the dolphin and its friendship with people.

　　　 There is a story about sailors in the 19th century. In a dangerous part of the sea off the coast of New Zealand, they learnt to look for a dolphin called Jack. From 1871 to 1903, Jack met every boat in the area and showed it the way. Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack. He recovered and for nine years more continued to guide all ships through the area－except for The Penguin.

　　　 Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them.

65. Dolphins are different from many other animals in that they _____.

A. live in groups　 B. have large brains　 C. are warm-blooded D. have their own language

66. Which of the following does the dolphin use to help it find its way around?

A. Its nose.　　　 　　　　 B. Its ears.　　　 　　　　　　 C. Its mouth.　　　 　　　 D. Its eyes.

67. Why did the sailors off the coast of New Zealand look for Jack?

A. He was lonely and liked to be with people. B. They enjoyed playing with him.

C. He was seriously wounded. 　　　　　　　　　　　　　　 D. They wanted his help.

68. By telling the story of Jack, the writer wanted to show that _____.

A. dolphins are friendly and clever B. people are cruel to animals

C. Jack is different from other dolphins D. dolphins should be protected by law

　　　 Dolphins（海豚）are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this, they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brain is nearly the same size as our own, and they live a long time―at least twenty or thirty years. Like some animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and to help them find food. We now know they do not use their ears to receive these sounds, but the lower part of the mouth, called the jaw.

　　　 Strangely, dolphins seem to like man, and for thousands of years there have been stories about the dolphin and its friendship with people.

　　　 There is a story about sailors in the 19th century. In a dangerous part of the sea off the coast of New Zealand, they learnt to look for a dolphin called Jack. From 1871 to 1903, Jack met every boat in the area and showed it the way. Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack. He recovered and for nine years more continued to guide all ships through the area－except for The Penguin.

　　　 Today, some people continue to kill dolphins, but many countries of the world now protect them and in these places it is against the law to kill them.

65. Dolphins are different from many other animals in that they _____.

A. live in groups　 B. have large brains　 C. are warm-blooded D. have their own language

66. Which of the following does the dolphin use to help it find its way around?

A. Its nose.　　　 　　　　 B. Its ears.　　　 　　　　　　 C. Its mouth.　　　 　　　 D. Its eyes.

67. Why did the sailors off the coast of New Zealand look for Jack?

A. He was lonely and liked to be with people. B. They enjoyed playing with him.

C. He was seriously wounded. 　　　　　　　　　　　　　　 D. They wanted his help.

68. By telling the story of Jack, the writer wanted to show that _____.

A. dolphins are friendly and clever B. people are cruel to animals

C. Jack is different from other dolphins D. dolphins should be protected by law