________ air is to man, so is water to fish.

[　　]

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项．

　　With their shiny, grey bodies, dolphins（海豚）appear to be large fish．____1____, they are really warm-blooded mammals. Although they can stay under the water for up to 15 minutes ____2____, the dolphins must come up to breathe air through a hole on top of their heads.

　　Dolphins are social animals. Many of them even ____3____ around humans. In addition to being playful; they are helpful to men. For example ____4____ 400 B.C. the Great poet Arion was saved from ___5____ by a dolphin. From then until now, dolphins have been helping swimmers, ____6__ in trouble. Swimmers, however ,are not ___7____ humans they help. In some parts of the world, they help men ____8____ fish.

　　Dolphins are very clever. Its brain is even larger than a human's. Therefore, some people think a dolphin ____9__ smarter than a man, but ____10___, brain size is not the only measure of cleverness. Besides, measuring dolphin's cleverness in other ways is not possible ___11____ men cannot talk with them. But we can almost ____12____ that dolphins can talk with each other. They make different ____13____ which seem to be at least a form of language. Up to now men ____14___ able to find out how dolphins are talking. So no one really knows what they are thinking. If we could talk with them, perhaps they could teach us to be ___15____ they seem to be.

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项．

　　With their shiny, grey bodies, dolphins（海豚）appear to be large fish．____1____, they are really warm-blooded mammals. Although they can stay under the water for up to 15 minutes ____2____, the dolphins must come up to breathe air through a hole on top of their heads.

　　Dolphins are social animals. Many of them even ____3____ around humans. In addition to being playful; they are helpful to men. For example ____4____ 400 B.C. the Great poet Arion was saved from ___5____ by a dolphin. From then until now, dolphins have been helping swimmers, ____6__ in trouble. Swimmers, however ,are not ___7____ humans they help. In some parts of the world, they help men ____8____ fish.

　　Dolphins are very clever. Its brain is even larger than a human's. Therefore, some people think a dolphin ____9__ smarter than a man, but ____10___, brain size is not the only measure of cleverness. Besides, measuring dolphin's cleverness in other ways is not possible ___11____ men cannot talk with them. But we can almost ____12____ that dolphins can talk with each other. They make different ____13____ which seem to be at least a form of language. Up to now men ____14___ able to find out how dolphins are talking. So no one really knows what they are thinking. If we could talk with them, perhaps they could teach us to be ___15____ they seem to be.

阅读下面短文, 掌握其大意, 然后从1-25各题所给的四个选项中, 选出一个最佳答案。

(A)

　　    Millions of years ago, whales lived 1 and walked on 2 . Today whales 3 have small bones, 4 can only be seen on the inside of them. No one knows 5 whales left the land to live in the water. 6 , scientists can imagine when the whales changed their 7 conditions, their bodies underwent (经历) a change—showing a 8 fish-like appearance. This new 9 offered less resistance (抵抗) to the water. And the whales could 10 faster.

　　     Whales are not fish. 11 will die, just as a man will, if it stays under water too long. When a whale is under water it closes its 12 and holds its breath. The air in its lungs becomes very hot and its lungs are 13 water vapor. when a whale rises 14 and breathes, its hot breath produces a fountain (喷泉) of water that rises high in the air. A man produces 15 effect when he breathes warm air on a cold morning. 　　

　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　

1.	A.in water	B.on land	C.in the sea	D.on the beach	[    ]
2.	A.four legs	B.two hands	C.stomach	D.their back	[    ]
3.	A.even	B.still	C.never	D.also	[    ]
4.	A.that	B.they	C.as	D.which	[    ]
5.	A.how	B.why	C.where	D.when	[    ]
6.	A.However	B.Besides	C.And	D.And so	[    ]
7.	A.healthy	B.poor	C.bad	D.living	[    ]
8.	A.more	B.much	C.very	D.exact	[    ]
9.	A.kind	B.sort	C.type	D.form	[    ]
10.	A.walk	B.swim	C.crawl	D.run	[    ]
11.	A.Whales	B.A whale	C.The whale	D.One whale	[    ]
12.	A.nose	B.mouth	C.eyes	D.hands	[    ]
13.	A.full of	B.no	C.filled	D.out of	[    ]
14.	A.under the water	B.of the water	C.up the surface	D.to the surface	[    ]
15.	A.different	B.the same	C.such	D.as	[    ]

(B)

    Men are the cleverest and most dangerous (危险的) animals on the earth. 16 come second. Men kill many beasts, they've even killed millions of men since very long ago, but rats kill 17 men. Rats carry many diseases (疾病) and these diseases have killed and are still killing thousands and thousands of men 18 in many countries. Rats are dangerous not in only one 19 . They not only carry diseases into men's homes, they also eat up men's food. They eat 33 million tons of 20 every year. Men starve because rats eat their food. Rats are 21 , too. They have good leaders to tell them the food is 22 when men put poison (毒药) in it. There are a lot of rats in our cities and 23 today. We can go to the moon, but we can not kill all these horrible animals. Is it 24 this dangerous enemy is too clever and 25 too fast, or we are not clever enough and not clean enough?

　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　 　　

16.	A. Women	B. Rats	C. Foxes	D. Monkeys	[    ]
17.	A. more	B. several	C. none	D. fewer	[    ]
18.	A. yesterday	B. everyday	C. tomorrow	D. today	[    ]
19.	A. way	B. day	C. time	D. moment	[    ]
20.	A. vegetables	B. leaves	C. grass	D. grain	[    ]
21.	A. brave	B. clever	C. dirty	D. careful	[    ]
22.	A. helpful	B. fearless	C.terrible	D. dangerous	[    ]
23.	A. valleys	B. streets	C. villages	D. forests	[    ]
24.	A. whether	B. because	C. wherever	D. while	[    ]
25.	A. travels	B. walks	C. runs	D. grows	[    ]