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B
Although man has known asbestos for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H. W. Johns, owner of a New York City Supply Shop for roofers, was responsible for he opening of that first mine.
Mr. Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands. How astonished the customers were to discover that he was not burned at all. You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport them from Italy to the United States, Mr. Johns sent out a young scientist to seek a source nearer home. This young man found great vein in the province of Quebec in Canada.
Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen. When it is mined, the asbestos is heavy, just as you would expect a mineral to be. When it is separated, a strange thing happens; the rock breaks down into fine, soft, soapy fibers .
Scientists do not know why the rock can be separated easily into threads,but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”.
60. Which title best expresses the main idea of this passage?
A. Asbestos mined in Canada B. Fireproof matter
C. A “wonder” mineral D. A new roofing material
61. Johns proved his ability as a salesman by_______.
A. going into roofing business
B. carrying asbestos from Italy
C. sending a trained scientist
D. showing the use of asbestos gloves
62. Which is the most important character of asbestos that the author wants to show us?
A. It is like thread. B. It feels soapy.
C. It burns easily. D. It is unusually heavy.
63. The author’s main purpose in writing this passage was to _______.
A. show the need for more scientists
B. compare asbestos with other minerals
C. increase the sales of asbestos
D. present facts about asbestos
完型填空
Have you ever imagined that you could be cloned like Dolly the sheep in the not too distant future?
The news that a human embryo (胚胎) has been 1 cloned for the first time has caused mixed reactions (反映).
The 2 was carried out by scientists from the Advanced Cell Technology Inc (ACT), in Massachusetts, US. The group 3 the news on November 25.
“This is 4 human being. A clone is alive, it walks, it breathes,” said Jamie Grifo, 5 on the study of cloning at New York University School of Medicine.
“This is a set of cells in a lab that will be used to 6 someone's life. ”
Such research could lead to treatment for 7 such as heart diseases, AIDS and even cancer, 8 scientists.
Despite high hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several 9 in the US do not allow human cloning. President George W. Bush also made it clear that he is 10 any type of human cloning. However, the scientists at ACT said they have no interest at present in 11 an early embryo into __12__.
Animals have been cloned repeatedly since Dolly the sheep 13 in 1997. And there were no real technical 14 to stand in the way of scientists making a cloned human embryo.
This time the research group used traditional cloning technology with a human 15
16 it was given DNA from an adult cell, the egg began to __17__.__18__ it was stopped from becoming a baby--at a stage in which it was 19 a ball of cells. The 20 technology has been used to clone sheep, cattle and monkeys.
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完形填空
Harriet Tubman was born a slave. She didn't get a 1 to go to school. 2 a child, she had to work very hard in the fields all day. In this 3 her master could 4 a lot of money when he 5 his crops. Harriet 6 , think that she was being treated fairly. After Harriet grew up, she ran away from the farm to the northern states. 7 , and in Canada, black people were free. Harriet liked to be free, she felt 8 for all of the black people who were 9 slaves. Harriet returned to the south W help other slaves to run away. She made sure they got to 10 .
Harriet was in great 11 12 a law that had just been passed. The law 13 it was not permitted to 14 slaves run away. She also found out 15 the slave owners said they would pay $40,000 to anyone who could catch H. Tubman.
There were many stories about Harriet 16 , slaves run away . In all, she made nineteen 17 back to the south and led about 300 slaves to freedom. When the Civil War broke out, the northern states 18 against the southern states. Harriet 19 the northern states because the northerners believed that slaves should be free. She worked as a nurse and spied 20 enemy lines until the northern states won the war.
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I’m lying on my back in my grandfather’s orchard(果园)，looking up at the branches above me.It is one of the last days of summer.Already the days are shorter and the nights are cooler.Some kinds of apples are already ripe(成熟的).Others will be ready to pick soon.I think of my grandmother’s apple pie，and how I used to make it with her.She died last year，before the apple harvest，and I have not had her pie since.I really miss her.I hear bees busily humming about，visiting the late summer flowers.The gentle hum of their wings nearly sends me to sleep.
The sky is as blue as my grandfather’s eyes.Above me，big white clouds race across the sky like pieces of cotton blowing in the w ind.School starts in another week，and time seems to have slowed down.
“Sophie！”calls my grandfather.“Is that you？”I stand up，take his hand，and tell him all about my day as we walk through the orchard.We talk about apples，and bees，and Grandma.He tells me that he misses her too.
He puts his rough，brown farmer’s hand around my shoulder and pulls me close.“You know，Sophie，”he says，“I spent the morning in the attic(阁楼)，and you’ll never guess what I found.It’s the recipe(烹饪法) for Grandma’s apple pie.I used to help her make it sometimes.I can’t do it all alone，but you used to help her too.Maybe between the two of us，we ca n work it out.Want to try？”
“But it won’t be the same without Grandma，” I tell him.
“That’s true，”he says，“but nothing_is_the_same_without_Grandma.Still，I don’t think that she would want us never to have another apple pie.What do you say？” I nod yes，and we walk towards home...towards an afternoon in the farmhouse kitchen，making Grandma’s famous apple pie.
1.We learn from the passage that Sophie .
A．likes to watch clouds in the attic
B．comes to the orchard after school
C．enjoys Grandma’s apple pie very much
D．picks many apples in the orchard
2.Sophie’s grandfather spent the morning in the attic______ .
A．looking for Grandma’s recipe for apple pie
B．helping Sophie’s grandmother make apple pie
C．trying to make apple pie all alone for Sophie
D．talking about apples，and bees，and Grandma with Sophie
3.The underlined part in the last paragraph shows
A．how much Sophie’s grandmother loved Sophie
B．how much Sophie’s grandfather likes apple pies
C．how much Sophie loves her grandfather’s orchard
D．how much Sophie’s grandfather misses Grandma
4.Which of the following might be the best title for the passage?
A．My grandfather’s orchard B．My grandmother’s apple pie
C．A morning in the attic D．The last days of summer
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