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Read the following two texts. Answer the questions on each text by choosing A B C or D.

根据下面资料，回答26-30题

The most frightening words in the English language are, "Our computer is down. " You hear it more and more when you are on business. The other day I was at the airport waiting for a ticket to Washington and the girl in the ticket office said, "I′ m sorry, I can′ t sell you a ticket. Our computer is down. "

"If your computer is down, just write me out a ticket. "

"I can′ t write you out a ticket. The computer is the only one allowed to do so."

I looked down on the computer and every passenger was just standing there drinking coffee and staring at the black screen. Then I asked her, "What do all you people do?"

"We give the computer the information about your trip, and then it tells us whether you can fly with us or not. "

"So when it goes down, you go down with it. "

"That′ s good, sir. "

"How long will the computer be down?" I wanted to know.

"I have no idea. Sometimes it′ s down for 10 minutes, sometimes for two hours. There′s no way we can find out without asking the computer, and since it′ s down it won′ t answer us. "

After the girl told me they had no backup computer because it′ s high price. I said. "Let′ s forget the computer. What about your planes? They′ re still flying, aren′t they?"

"I couldn′ t tell without asking the computer. "

"Maybe I could just go to the gate and ask the pilot if he′ s flying to Washington," I suggested.

"I wouldn′ t know what gate to send you to. Even if the pilot was going to Washington, he couldn′ t take you if you didn′ t have a ticket. "

"Is there any other airline flying to Washington within the next few hours?"

"I wouldn′ t know," she said, pointing at the dark screen. "Only ′ IT′ knows. It can′ t tell me."

By this time there were quite a few people standing in lines. The word soon spread to other travelers that the computer was down．Some people went white：some people started to cry and still others kicked their luggage．

26[单选题] The best title for the article is__________．

A.When the Computer Is Down

B.The Most Frightening Words

C.The Computer of the Airport

D.Asking the Computer

27[单选题] What could the girl in the ticket office do for the passengers without asking the computer?

A.She could sell a ticket．

B.She could write out a ticket．

C.She could answer the passengers’questions．

D.She could do nothin9．

28[单选题] Why do you think they had not a backup computer?

A.Because it was easy down．

B.Because it was very expensive．

C.Because it was not advanced enough．

D.Because it was not as big as the main computer．

29[单选题] The last paragraph suggests that__________．

A.a modem computer won’t be down

B.computers can take the place of humans

C.sometimes a computer may bring suffering to people

D.there will be great changes in computers

30[单选题] What did passengers do when the computer was down?

A.They left home and went home．

B.They drank coffee and stared at the black screen．

C.They began to talk to each other．

D.None above．

材料题

根据下面资料，回答31-35题

Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour′ s flight, one of the scientists wrote in his book, "Look here for proba-ble metal. " Scientists in another airplane, flying over a mountain area, sent a message to other sci-entists on the ground, "Gold possible. " Walking across hilly ground, four scientists reported,"This ground should be searched for metal. " From an airplane over a hilly wasteland a scientist sent back by radio one word: "Uranium. "

None of the scientists had X-ray eyes: they had no magic power of looking down below the earth′ s surface. They were merely putting to use one of the newest methods of locating minerals in the ground.., trees and plants as signs that certain minerals may lie beneath the ground on which the trees and plants are growing.

This newest method of searching for minerals is based on the fact that minerals deep in the earth may affect the kind of bushes and trees that grow in the surface.

At Watson Bar Greek, a brook(小溪) six thousand feet high in the mountains of British Co-lumbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with small branches from the trees. Roots were dug and put into boxes. Each bag and box was carefully marked. In a scientific laboratory, the parts of the forest trees were burned to ashes and tested.

Each small part was examined to learn whether there were minerals in it.

Study of the roots, branches, and seeds showed no silver. But there were small amounts of gold in the roots and a little less gold in the branches and seeds. The seeds growing nearest to the tree trunks had more gold than those growing on the ends of the branches.

31[单选题] Scientists were flying over a desert or a hilly wasteland or a mountain area in order to search for__________in the ground．

A.gold

B.silver

C.uranium

D.minerals

32[单选题] The study of flees．branches and roots shows that__________．

A.there were larger amounts of gold in the branches than in the seeds

B.there were smaller amounts of gold in the roots than in the branches

C.there were less amounts of gold in the seeds growing on the ends of branches than seeds growing nearest to the tree trunks

D.there was more gold in the branches than in the roots

33[单选题] Which is the best title suggested below?

A.Scientists Searching for Metals with Special Power

B.New Methods of Searching for Minerals

C.Gold Could Be Found by Trees and Plants

D.A New Method of Searching for Minerals--Using Trees and Plants

34[单选题] Which of the following is NOT mentioned as part of a tree that Can help find minerals?

A.Leaves．

B.Roots．

C.Branches．

D.Seeds．

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