Thousands of villages in the developing world have no telephones. They have no money to build telephone systems. A new kind of technology may help change this situation. I t reduces the cost of building and using telephone systems.

Traditional systems use wires to carry electrical signals from one telephone to another. The wires often cost much more than telephones. The new system is based on radio communication. Each telephone sends and receives signals through the air, but not through the wires. This reduces the cost greatly. The radio telephone gets their power from the sun.

Each is connected to a solar equipment that changes the sun’s energy into electricity. A battery stores the electricity until someone needs to make or receive a call. The telephone turns off by itself if the level of power in the battery falls too low. This prevents damage to the system. Each radio telephone is connected to a computer microprocessor. It rewards how many calls are sent and received. It controls the power supply.

The technology needs more study, but its new use of radio equipment sun power and computers may help start telephone ringing in the other parts of the world.

68. The radio telephone gets their power from_____.

A. the sun 　　　B. electricity 　　　C. battery 　　　D. a special equipment

69. Each telephone is connected to_____.

A. a solar equipment 　　　　　　　B. a radio machine

C. a computer microprocessor 　　　D. Both A and C

70. From the passage we can infer that_____.

A. the new telephone system costs less than before

B. we can not use the radio as before

C. the new telephone system will take the place of the old one

D. it will be much easier to radio from now on

71. The main idea of the passage is_____.

A. a simple telephone system has been invented and costs less money

B. thousands of villages will use the new telephone system very soon

C. traditional telephone system will become useless

D. the new system will be too good to use

Thousands of villages in the developing world have no telephones. They have no money to build telephone systems. A new kind of technology may help change this situation. I t reduces the cost of building and using telephone systems.
Traditional systems use wires to carry electrical signals from one telephone to another. The wires often cost much more than telephones. The new system is based on radio communication. Each telephone sends and receives signals through the air, but not through the wires. This reduces the cost greatly. The radio telephone gets their power from the sun.
Each is connected to a solar equipment that changes the sun’s energy into electricity. A battery stores the electricity until someone needs to make or receive a call. The telephone turns off by itself if the level of power in the battery falls too low. This prevents damage to the system. Each radio telephone is connected to a computer microprocessor. It rewards how many calls are sent and received. It controls the power supply.
The technology needs more study, but its new use of radio equipment sun power and computers may help start telephone ringing in the other parts of the world.
68. The radio telephone gets their power from_____.
A. the sun 　　　B. electricity 　　　C. battery 　　　D. a special equipment
69. Each telephone is connected to_____.
A. a solar equipment 　　　　　　　B. a radio machine
C. a computer microprocessor 　　　D. Both A and C
70. From the passage we can infer that_____.
A. the new telephone system costs less than before
B. we can not use the radio as before
C. the new telephone system will take the place of the old one
D. it will be much easier to radio from now on
71. The main idea of the passage is_____.
A. a simple telephone system has been invented and costs less money
B. thousands of villages will use the new telephone system very soon
C. traditional telephone system will become useless
D. the new system will be too good to use

B
　A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increases the risk.
　Research from the University of Iowa based their findings on a review of 18 earlier studies that looked at the association between sunscreen use and melanoma (黑素瘤). They said that they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma.
　Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the United States.
　But questions have been raised about sunscreen and whether it may have the opposite effect by allowing people to remain exposed to the sun longer without burning.
　The researchers said that among the problems with some earlier studies is that they often failed to take into account that those people most at risk for skin cancer---are more likely to use sunscreen. As a result, it may appear that sunscreen users get cancer more often.
　The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to prove how well the products had been applied, said the new study.
60．The underlined word “flaws” in the 2nd paragraph most probably means _________.
A．evidences         B．facts         C．faults         D．failures
61．People with fair skin and freckles ________.
A．seldom use sunscreen　　　　　　         B．are more in danger of skin cancer
C．can be free from the harm of the sun　　     D．often expose themselves to the sun
62．We can learn from the passage that _________.
A．sunscreen users get skin cancer more often
B．the volunteers have proved the effect of the sunscreen
C．the new study has based on the experiences of volunteers
D．the number of skin cancer patients is increasing in America
63．Which of the following is the best title of the passage?
A．Sunscreen to Prevent Skin Cancer　      B．Sunscreen to Increase Skin Cancer
C．Skin Cancer Caused by Sunscreen　      D．Skin Cancer Caused by Freckles

第四部分:短文改错:10%
Besides Egyptians, people of Mexico also builded     　　　41._____________
pyramids. They didn’t build the pyramids for tombs. They   　　 42._____________
were used to build a pyramid and then build a temple on    　　  43.____________
top of them. The pyramids of Mexico are not as high as    　　  44.______________
that of Egypt, but they are big. Each pyramid has a wide    　　　45.____________
stairway that go from the bottom to the top.              　　　46._____________
The biggest pyramid in Mexico is almost 2000 year  　　　　　　47.___________
old. Scientists think it spent 10,000 men more than ten years 　　　48.____________
to build. On top of it they build a temple to worship sun.    　　　49.____________
The temple is no longer there and people call it the pyramid 　　　 50.____________
of the sun.

第四部分:短文改错:10%

Besides Egyptians, people of Mexico also builded      　　　41._____________

pyramids. They didn’t build the pyramids for tombs. They    　　 42._____________

were used to build a pyramid and then build a temple on     　　  43.____________

top of them. The pyramids of Mexico are not as high as     　　  44.______________

that of Egypt, but they are big. Each pyramid has a wide     　　　45.____________

stairway that go from the bottom to the top.               　　　46._____________

The biggest pyramid in Mexico is almost 2000 year   　　　　　　47.___________

old. Scientists think it spent 10,000 men more than ten years  　　　48.____________

to build. On top of it they build a temple to worship sun.     　　　49.____________

The temple is no longer there and people call it the pyramid 　　　 50.____________

of the sun.