A Battery’s Nightmare
Portable electronics that can be carried about easily are only as good as their batteries (电池) and, let’s face it, batteries aren’t very good, especially when compared with, say, petrol, which packs 100 times a battery’s energy into an equal space. That’s why a large group of mechanical engineers (centered at the Massachusetts Institute of Technology, but with partners at other universities and companies) are hard at work in an effort to replace batteries with a tiny engine that runs on fuel. Imagine a battery-free life! When the fuel runs out in your mobile phone, you just fill up and go.
The engine---about the size of a ten-cent coin---starts with a combustion chamber (燃烧室) that burns hydrogen. Its tiny parts are etched (蚀刻) onto silicon wafers (硅片) in the same manner that computer parts are etched onto integrated circuits (集成电路). The first engine is made up of five wafers. And since these wafers could be produced in much the same way as computer chips, they could probably be produced quite cheaply.
But the devil in all this nice detail is efficiency. Tiny engine parts don’t always behave like the bigger parts of the first engine. Something between the parts can slow down the works, according to Columbia University Professor LucFrechette, one of the engine’s designers. Extreme heat from the combustion chamber is also a problem, often leaking to other parts of the engine.
The scientists’ goal is to create an engine that will operate 10 times better than batteries operate. Frechette says that a complete system, with all parts in place and working, will be set up in the next couple of years, but commercial models aren’t likely until at least the end of the next ten years.
【小题1】According to the passage, the title suggests that _______ .

A．batteries should be greatly improved

B．petrol will be used instead of batteries

C．the time of batteries will be gone forever

D．pollution problems caused by batteries must be solved

【小题2】What’s the meaning of the underlined word “devil” in paragraph 3?

A．Problem

B．Advantage

C．Invention

D．Technique

【小题3】What can we infer from the passage?

A．The new invention doesn’t need any fuel.

B．The new engine has been produced in large quantities.

C．The new invention is much cheaper than the battery.

D．The new engine needs to be improved before it’s on sale.

A Battery’s Worst Nightmare(噩梦)
Portable electronics that can be carried about easily are only as good as their batteries and, let’s face it, batteries aren’t very good, especially when compared with, say, petrol, which packs 100 times a battery’s energy into an equal space. That’s why a large group of mechanical engineers (centered at the Massachusetts Institute of Technology, but with partners at other universities and companies) are hard at work in an effort to replace batteries with a tiny engine that runs on fuel. Imagine a battery-free life!When the fuel runs out in your laptop or mobile phone, you just fill up and go.
The engine, about the size of a ten-cent coin, starts with a combustion chamber (燃烧室) that burns hydrogen (氢). Its tiny parts are etched onto silicon wafers (硅片) in the same manner that computer parts are imprinted onto integrated circuits (集成电路). The first engine is made up of five wafers. And since these wafers could be produced in much the same way as computer chips, they could probably be produced quite cheaply.
But the devil in all this nice detail is efficiency(效率). Tiny engine parts don’t always behave like their scaled-up parts of the first engine. Something between the parts can slow down the work, according to Columbia University professor Luc Frechette, one of the engine’s designers. Extreme heat from the combustion chamber is also a problem, often leaking to other parts of the engine.
The scientists’ goal is to create an engine that will operate 10 times better than batteries do. Frechette says that a complete system, with all parts in place and working, will be set up in the next couple of years, but commercial models aren’t available until at least the end of the next ten years. 
【小题1】.
. According to the passage, the title suggests that ________.

A．batteries should be greatly improved	B．petrol will be used instead of batteries
C．the time of batteries will be gone forever	D．pollution caused by batteries must be prevented

【小题2】.
What’s the meaning of the underlined word “devil” (In Paragraph 3)?

A．Problem.

B．Advantage.

C．Invention.

D．Technique.

【小题3】.
What can we infer from the passage?

A．The new invention doesn’t need any fuel.

B．The new engine has been produced in quantity.

C．The new invention is much cheaper than the battery.

D．The new engine needs to be improved before it’s on sale.

【小题4】.
. What is the main purpose of this passage?

A．To introduce a new invention to readers.	B．To persuade readers not to use batteries.
C．To show us how the new invention works.	D．To declare when the engine will be on sale.

A serious problem for today’s society is who should be responsible for our elderly(老年人) and how to improve their lives. It is not only a financial problem but also a question of the system we want for our society. I would like to suggest several possible solutions to this problem.
First, employers should take the responsibility for their retired employees. To make this possible, a percentage of profits should be set aside for this purpose. But when a company must take life-long responsibility for its employees, it may suffer from a commercial disadvantage due to higher employee costs.
Another way of solving the problem is to return the responsibility to the individual. This means each person must save during his working years to pay for his years of retirement. This does not seem a very fair model since some people have enough trouble paying for their daily life without trying to earn extra to cover their retirement years. This means the government might have to step in to care for the poor.
In addition, the government could take responsibility for the care of the elderly. This could be financed through government taxes to increase the level of pensions（养老金）. Furthermore, some in-situation should be created for senior citizens, which can help provide a comfortable life for them. Unfortunately, as the present situation in our country shows, this is not a truly viable answer. The government can seldom afford to care for the elderly, particularly when it is busy trying to care for the young.
One further solution is that the government or social organizations establish some working places especially for the elderly where they are independent.
To sum up, all these options（选择）have advantages and disadvantages. Therefore, it is reasonable to expect that some combination of these options may be needed to provide the care we hope to give to our elderly generations.
【小题1】What is the passage mainly about?

A．The problems faced by the old in society.

B．Why we should take responsibility for the old.

C．How we can improve the lives of the old.

D．Where the old can go to get their pensions.

【小题2】According to the passage, how can the government help to improve the lives of retired people?

A．Set aside some profits to help people with problems after they retire.

B．Increase savings levels of people during their working years.

C．Increase the discounts for food and transport for the old.

D．Make available pensions for those who have retired.

【小题3】The underlined word “viable” most probably means “__________”.

A．impossible

B．practical

C．useful

D．successful

【小题4】What can be concluded from the passage?

A．Taking care of the old is mainly an issue of money.

B．Employers should allow their workers to retire at a later age.

C．Becoming independent should be the goal of most old people.

D．There is no single solution to the problems of the old.

【小题5】What is the writer’s main purpose in writing this article?

A．To point out the need for government support for old people.

B．To make general readers aware of the problems of retired people.

C．To discuss some possible solutions to an important social problem.

D．To instruct retired people on how they can have a happier life.

A serious problem for today’s society is who should be responsible for our elderly and how to improve their lives. It is not only a financial problem but also a question of the system we want for our society. I would like to suggest several possible solutions to this problem.
First, employers should take the responsibility for their retired employees. To make this possible, a percentage of profits should be set aside for this purpose. But when a company must take life-long responsibility for its employees, it may suffer from a commercial disadvantage due to higher employee costs.
Another way of solving the problem is to return the responsibility to the individual. This means each person must save during his working years to pay for his years of retirement. This does not seem a very fair model since some people have enough trouble paying for their daily life without trying to earn extra to cover their retirement years. This means the government might have to step in to care for the poor.
In addition, the government could take responsibility for the care of the elderly. This could be financed through government taxes to increase the level of pensions(养老金). Furthermore, some in-situations should be created for senior citizens, which can help provide a comfortable life for them. Unfortunately, as the present situation in our country shows, this is not a truly viable answer. The government can seldom afford to care for the elderly, particularly when it is busy trying to care for the young.
One further solution is that the government or social organizations establish some working places especially for the elderly where they are independent.
To sum up, all these options(选择) have advantages and disadvantages. Therefore, it is reasonable to expect that some combination of these options may be needed to provide the care we hope to give to our elderly generations.
【小题1】According to the passage, how can the government help to improve the lives of retired people?

A．Set aside some profits to help people with problems after they retire.

B．Increase savings levels of people during their working years.

C．Increase the discounts for food and transport for the old.

D．Increase the level of pensions.

【小题2】The underlined word “viable” in the fourth paragraph most probably means “______”.

A．impossible

B．practical

C．perfect

D．obvious

【小题3】What is the writer’s main purpose in writing this article?

A．To point out the need for government support for old people.

B．To make general readers aware of the problems of retired people.

C．To discuss some possible solutions to an important social problem.

D．To instruct retired people on how they can have a happier life.

A serious problem for today's society is who should be responsible for our elderly and how to improve their lives. It is not only a financial problem but also a question of the system we want for our society. I would like to suggest several possible solutions to this problem.
First, employers should take the responsibility for their retired employees. To make this possible, a percentage of profits should be set aside for this purpose. But when a company must take life-long responsibility for its employees, it may suffer from a commercial disadvantage due to higher employee costs.
Another way of solving the problem is to return the responsibility to the individual. This means each person must save during his working years to pay for his years of retirement. This does not seem a very fair model since some people have enough trouble paying for their daily life without trying to earn extra to cover their retirement years. This means the government might have to step in to care for the poor.
In addition, the government could take responsibility for the care of the elderly. This could be financed through government taxes to increase the level of pensions. Furthermore, some institutions should be created for senior citizens, which can help provide a comfortable life for them. Unfortunately, as the present situation in our country shows, this is not a truly viable answer. The government can seldom afford to care for the elderly, particularly when it is busy trying to care for the young.
One further solution is that the government or social organizations establish some working places especially for the elderly where they are independent.
To sum up, all these options have advantages and disadvantages. Therefore, it is reasonable to expect that some combination of these options may be needed to provide the care we hope to give to our elderly generations.
【小题1】What is the passage mainly about?

A．The problems faced by the old in society.

B．Why we should take responsibility for the old.

C．How we can improve the lives of the old.

D．Where the old can go to get their pensions.

【小题2】 The underlined word "viable" most probably means"       ".

A．impossible

B．practical

C．useful

D．important

【小题3】What is the writer's main purpose in writing this article?

A．To point out the need for government support for old people.

B．To make general readers aware of the problems of retired people.

C．To discuss some possible solutions to an important social problem.

D．To instruct retired people on how they can have a happier life.

【小题4】The text is most likely to be found in a book about____.  

A．social science	B．historical events
C．political problem	D．political systems