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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 | [ ] |
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阅读下列短文,从所给的四个选项中,选出最佳答案
You have learned that we can't live without air. We need air in order to live. Do you know that fires too need air in order to burn? If there is no air, you would not be able to make a fire. The more air there is, the longer something will burn.
Let's make an experiment to show this. Take three candles of the same size and two jars, one bigger than the other. Stand the three candles separately and light them. Allow the first one to burn in the open, cover the second one with the smaller jar and the last one with the large jar. Which candle flame(火焰) dies out first? Which candle continues to burn? What will happen to them after some time?
(1) According to the passage, all of us know that ______.
[ ]
A.the less wind there is, the less flame a candle has
B.the more wind there is, the less flame a candle has
C.air is necessary for our lives
D.we live in order to take in air
(2) The experiment will show ______.
[ ]
A.we cannot live without air
B.we can make a fire unless there is much air
C.the candle in the biggest jar will burn the longest
D.the less air there is, the shorter time a candle will burn
(3) When you light the three candles and cover two of them, you will see the candle in the smaller jar _____.
[ ]
A.will die out soon B.goes on burning for long
C.doesn't die out D.continutes to burn
(4) What will the flames of the three candles look like shortly after the experiment begins? Choose one picture which tells the correct experiment.
[ ]
(5) If you observe the experiment for some time, you will finally find that ______.
[ ]
A.only the second candle flame dies out
B.no candles stop burning
C.only the first candle flame doesn't die out
D.the flames of the three candles continue to be seen
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