Speaker: Will people still run their errands in the same way fifty years from now Will they still go to grocery store for food and to the bank for money Some experts think that in fifty years, people will run both of these errands and maybe more from their living rooms. It is convenient to do so. What they will have to do is buy home computers without even having to take any course in programming. They will simply talk to their computers, and if it is possible, the computers will talk back to them. By and by, people will do shopping at home. It saves much of their time. For example, a family wants to buy a TV. They will see a picture of the model they want on a video screen and find the store with the most reasonable price. Then they will send a message to that store, and the right amount of money will be taken out of their bank and put into the store’s. Many people will run most of their errands electronically. But sometimes, they will still want to go shopping in the old-
A. Because it saves much of their money and time.
B. Because they will simply talk to their home computers.
C. Because they will exchange their ideas with computers.
D. Because it is convenient and time-saving.
Speaker: Will people still run their errands in the same way fifty years from now Will they still go to grocery store for food and to the bank for money Some experts think that in fifty years, people will run both of these errands and maybe more from their living rooms. It is convenient to do so. What they will have to do is buy home computers without even having to take any course in programming. They will simply talk to their computers, and if it is possible, the computers will talk back to them. By and by, people will do shopping at home. It saves much of their time. For example, a family wants to buy a TV. They will see a picture of the model they want on a video screen and find the store with the most reasonable price. Then they will send a message to that store, and the right amount of money will be taken out of their bank and put into the store’s. Many people will run most of their errands electronically. But sometimes, they will still want to go shopping in the old-
A. To go shopping.
B. To operate computers.
C. To help do something.
D. To shop electronically.
Regeneration of Limbs
Most people would agree that it would be wonderful if humans could regenerate limbs. These who have lost their arms or legs would be complete again. The day is still far off when this might happen. But in the last 10 years, doctors have reported regeneration in smaller parts of the body, most often fingers.
Regeneration is not a newly-discovered process. For centuries, scientists have seen it work in some kinds of animals. Break off a lizard’s (蜥蜴的) tail, for example, and it will grow a new tail. Scientists now are looking for a way to turn on this exciting ability in more highly-developed animals, including humans. Their experiments show that nerves, cell chemistry and the natural electric currents in the body all seem to have a part in this process.
The body of every animal contains general purpose cells that change into whatever kind of cells the body needs. Animals such as the lizard or salamander (蝾螈) use these cells
A. humans can never regenerate limbs.
B. humans might be able to regenerate limbs in the future.
C. human limbs may be regenerated on some animals first.
D. regeneration of human limbs will soon become a reality.
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