"Spending as little as $5 a day on someone else can make you happier," the researchers from a team at the University（大学）of British Columbia and Harvard Business School reported.

    Their experiments on 600 volunteers in the US showed people were feeling happier when they spent money on others.

    The team asked their 600 volunteers about their income（收入），their daily costs, gifts for others and donations to charity. "No matter how much money each person made, those who spent money on others could get greater happiness than those who spent money only on themselves," Dunn said.

     Dunn's team also surveyed 16 workers at a company in Boston after they received an award of between $3,000 and $8,000. "Of course they felt happy after receiving the awards," they wrote in their report. "But when they gave the people in need $5, they were happier."

     "The findings showed that as little as $5 could be enough to produce happiness on a whole day," Dunn said.

1. There were ______ people in all who took part in the experiments.

2.The underlined word "experiments" means ______ in Chinese.

    A. 会议　　　　　　B. 表演             C. 实验             D. 化验

3.What does the passage mainly tell us?

    A. Money is not important for people.

    B. Money really can "buy" happiness if you spend it on others.

    C. We should try our best to give our money to more people in need.

    D. Spend all the money on others and you'll feel happier.

Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!

   Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

   British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

   But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.

  Will there be a better indicator than litmus paper? The three kids decided to try and find out!

    How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.

   The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!

"It's our first scientific journey, Huang said, "But it makes me want to try harder."

1. Whom did the three kids want to challenge?

A. Their chemistry teacher.     B. Their headmaster.

C. Robert Boyle              D. Thomas Edison

2. From the text, a red cabbage is a kind of ____.

A. plant　　B. animal　　C. paper　　D. liquid

3.What is widely used as the acid-base indicator now?

A. red cabbage              B. litmus paper

C. any plant                D. any flower 

4.The story mainly tells us ____.

A. how to make litmus paper    B. about the three kids' spirit

C. scientists were wrong        D. the kids are heroes

"Spending as little as $5 a day on someone else can make you happier," the researchers from a team at the University（大学）of British Columbia and Harvard Business School reported.

    Their experiments on 600 volunteers in the US showed people were feeling happier when they spent money on others.

    The team asked their 600 volunteers about their income（收入），their daily costs, gifts for others and donations to charity. "No matter how much money each person made, those who spent money on others could get greater happiness than those who spent money only on themselves," Dunn said.

     Dunn's team also surveyed 16 workers at a company in Boston after they received an award of between $3,000 and $8,000. "Of course they felt happy after receiving the awards," they wrote in their report. "But when they gave the people in need $5, they were happier."

     "The findings showed that as little as $5 could be enough to produce happiness on a whole day," Dunn said.

1. There were ______ people in all who took part in the experiments.

2.The underlined word "experiments" means ______ in Chinese.

    A. 会议　　　　　　B. 表演             C. 实验             D. 化验

3.What does the passage mainly tell us?

    A. Money is not important for people.

    B. Money really can "buy" happiness if you spend it on others.

    C. We should try our best to give our money to more people in need.

    D. Spend all the money on others and you'll feel happier.

1 

Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!

Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.

Will there be a better indicator than litmus paper? The three kids decided to try and find out!

How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.

The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best color change. They decided it was the litmus paper!

"It's our first scientific journey, Huang said, "But it makes me want to try harder."

1.Whom did the three kids want to challenge?

A. Their chemistry teacher.

B. Their headmaster.

C. Robert Boyle

D. Thomas Edison

2.From the text, a red cabbage is a kind of ____.

A. plant　　B. animal　　C. paper　　D. liquid

3.What is widely used as the acid-base indicator now?

A. red cabbage              B. litmus paper

C. any plant                D. any flower 

4.The story mainly tells us ____.

A. how to make litmus paper

B. about the three kids' spirit

C. scientists were wrong

D. the kids are heroes

　　Time spent in a bookshop can be most enjoyable, whether you are a book-lover or only there to buy a book as a present. You may even have entered the shop just to find a shelter from a sudden rain. Whatever the reason, you can soon totally unaware of your surroundings. You soon become interested in some books or others, and usually it is only much later that you realize you have spent too much time there and have to rush off to keep some forgotten appointment.
　　This chance to escape the realities of everyday life is, I think, the main attraction of a bookshop. There are not many places where it is possible to do this. A music shop is very much like a bookshop. You can walk around such a place as much as you wish. If it is a good shop, no assistant will come up to you with the greeting “Can I help you?” You needn’t buy anything you don’t want. In a bookshop an assistant should remain in the background until you have finished reading. Then, and only then, are his services necessary.
　　Once, a medical student had to read a textbook which was far too expensive for him to buy. He couldn't borrow it from the library and the only copy he could find was in a certain bookshop. Every afternoon, therefore, he would go along to the shop and read a little of the book at a time. One day, however, he was disappointed to find the book missing from his usual place. He was about to leave, when he noticed the owner of the shop beckoning to him. Expecting to be told off, he went towards him. To his surprise, the owner pointed to the book which was tucked (folded beautifully) away in a corner. “I put it there in case anyone tries to buy it,” he said, and left the delighted student to continue his reading.
　　shelter: 遮蔽　　 unaware: 未意识到 attraction: 吸引　 beckon: 示意
　　45. According to the passage, the main attraction of a bookshop is that________.
　　A. people can learn something from books 　 　
　　B. it can be a shelter from a sudden rain
　　C. the surroundings are all about new knowledge 　　
　　D. it offers a chance to get free from the realities

　　46. The writer thinks that the assistant in a good bookshop should ________.
　　A. always greet customers pleasantly and warmly 　　
　　B. help the readers to find what they want to read
　　C. not talk while the customers are reading 　　
　　D. not stand beside the bookshelf all the time

　　47. The purpose of the writer in writing the last paragraph is to ________.
　　A. tell us a story that happened in a bookshop 　　
　　B. tell us what a good bookshop assistant is like
　　C. teach us how to read in a shop without buying books
　　D. advise us to hide books if we need them