题目内容
阅读理解
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 ________.
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A．surprising fish
B．human man's friends
C．intelligent mammals
D．interesting animals
2．In the second paragraph, “nursed” means ________.
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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 ________.
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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?
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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 ________.
[ ]
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