A well-dressed man entered a famous jewelry shop. He explained that he wished to buy a pearl for his wife’s birthday. The price didn’t matter. Since business had been very good for him that year. After examining a nice black one that cost $5000, he paid for the pearl in cash, shook hands with the jeweler, and left.

A few days later the man returned and said that his wife liked the pearl so much that she wanted another one just like it. It had to be exactly the same size and quality, as she wanted a pair of earrings made, “Can you give me any advice on how to get such a pearl?” said the man. The jeweler regretfully replied, “I would say it’s exactly impossible to find one exactly like that pearl.”

The rich man insisted that the jeweler advertise in the newspapers, offering $ 25,000 for the matching pearl. Many people answered the advertisement but nobody had a pearl that was just right.

Just when the jeweler had given up hope, a little old lady came into his store. To his great surprise, she pulled the perfect pearl from her purse. “I don’t like to part with it,” she said sadly, “I inherited it from my mother, and my mother inherited it from hers. But I really need the money.”

The jeweler was quick to pay her before she changed her mind. Then he called the rich man’s hotel to tell him the good news. The man, however, was nowhere to be found.

The man said he wanted to buy a pearl for ______.

A. his wife              B. his mother-in–law 

C. his own mother            D. no one

57. He paid $ 5,000 for the black pearl without bargaining because ______.

A. he was very rich            B. he wanted to make the jeweler believe him

C. he was anxious to get it       D. his business had been successful

He told the jeweler to get him another pearl that must be ______.

A. exactly the same size as the black one

B. exactly the same quality as the black one

C. worth no more than $ 25,000

D. exactly as big and nice as the black one

Many people answered the advertisement because they wanted _______.

A. to see the perfect pearl

B. to buy some beautiful pearls too

C. to get in touch with the rich man

D. to sell their own pearl at a high price

The jeweler couldn’t find the man anywhere because ______.

A. he died suddenly.

B. He happened to be out

C. He got $ 20,000 by cheating and had run away with the money.

D. He wouldn’t show up until the jeweler called him a second time.

A well-dressed man entered a famous jewelry shop. He explained that he wished to buy a pearl for his wife’s birthday. The price didn’t matter. Since business had been very good for him that year. After examining a nice black one that cost $5000, he paid for the pearl in cash, shook hands with the jeweler, and left.

A few days later the man returned and said that his wife liked the pearl so much that she wanted another one just like it. It had to be exactly the same size and quality, as she wanted a pair of earrings made, “Can you give me any advice on how to get such a pearl?” said the man. The jeweler regretfully replied, “I would say it’s exactly impossible to find one exactly like that pearl.”

The rich man insisted that the jeweler advertise in the newspapers, offering $ 25,000 for the matching pearl. Many people answered the advertisement but nobody had a pearl that was just right.

Just when the jeweler had given up hope, a little old lady came into his store. To his great surprise, she pulled the perfect pearl from her purse. “I don’t like to part with it,” she said sadly, “I inherited it from my mother, and my mother inherited it from hers. But I really need the money.”

The jeweler was quick to pay her before she changed her mind. Then he called the rich man’s hotel to tell him the good news. The man, however, was nowhere to be found.

The man said he wanted to buy a pearl for ______.

A. his wife             B. his mother-in–law 

C. his own mother       D. no one

He paid $ 5,000 for the black pearl without bargaining because ______.

A. he was very rich      B. he wanted to make the jeweler believe him

C. he was anxious to get it   D. his business had been successful

He told the jeweler to get him another pearl that must be ______.

A. exactly the same size as the black one

B. exactly the same quality as the black one

C. worth no more than $ 25,000

D. exactly as big and nice as the black one

Many people answered the advertisement because they wanted _______.

A. to see the perfect pearl

B. to buy some beautiful pearls too

C. to get in touch with the rich man

D. to sell their own pearl at a high price

The jeweler couldn’t find the man anywhere because ______.

A. he died suddenly.

B. He happened to be out

C. He got $ 20,000 by cheating and had run away with the money.

D. He wouldn’t show up until the jeweler called him a second time.

A well-dressed man entered a famous jewelry shop. He explained that he wished to buy a pearl for his wife’s birthday. The price didn’t matter. Since business had been very good for him that year. After examining a nice black one that cost $5000, he paid for the pearl in cash, shook hands with the jeweler, and left.
A few days later the man returned and said that his wife liked the pearl so much that she wanted another one just like it. It had to be exactly the same size and quality, as she wanted a pair of earrings made, “Can you give me any advice on how to get such a pearl?” said the man. The jeweler regretfully replied, “I would say it’s exactly impossible to find one exactly like that pearl.”
The rich man insisted that the jeweler advertise in the newspapers, offering $ 25,000 for the matching pearl. Many people answered the advertisement but nobody had a pearl that was just right.
Just when the jeweler had given up hope, a little old lady came into his store. To his great surprise, she pulled the perfect pearl from her purse. “I don’t like to part with it,” she said sadly, “I inherited it from my mother, and my mother inherited it from hers. But I really need the money.”
The jeweler was quick to pay her before she changed her mind. Then he called the rich man’s hotel to tell him the good news. The man, however, was nowhere to be found.
【小题1】The man said he wanted to buy a pearl for ______.
A. his wife             B. his mother-in–law 
C. his own mother           D. no one
57. He paid $ 5,000 for the black pearl without bargaining because ______.
A. he was very rich           B. he wanted to make the jeweler believe him
C. he was anxious to get it      D. his business had been successful
【小题2】He told the jeweler to get him another pearl that must be ______.

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 well-dressed man entered a famous jewelry shop. He explained that he wished to buy a pearl for his wife’s birthday. The price didn’t matter. Since business had been very good for him that year. After examining a nice black one that cost $5000, he paid for the pearl in cash, shook hands with the jeweler, and left.
A few days later the man returned and said that his wife liked the pearl so much that she wanted another one just like it. It had to be exactly the same size and quality, as she wanted a pair of earrings made, “Can you give me any advice on how to get such a pearl?” said the man. The jeweler regretfully replied, “I would say it’s exactly impossible to find one exactly like that pearl.”
The rich man insisted that the jeweler advertise in the newspapers, offering $ 25,000 for the matching pearl. Many people answered the advertisement but nobody had a pearl that was just right.
Just when the jeweler had given up hope, a little old lady came into his store. To his great surprise, she pulled the perfect pearl from her purse. “I don’t like to part with it,” she said sadly, “I inherited it from my mother, and my mother inherited it from hers. But I really need the money.”
The jeweler was quick to pay her before she changed her mind. Then he called the rich man’s hotel to tell him the good news. The man, however, was nowhere to be found.
1. The man said he wanted to buy a pearl for ______.
A. his wife   B. his mother-in–law  C. his own mother   D. no one
2. He paid $ 5,000 for the black pearl without bargaining because ______.
A. he was very rich    B. he wanted to make the jeweler believe him
C. he was anxious to get it   D. his business had been successful
3. He told the jeweler to get him another pearl that must be ______.
A. exactly the same size as the black on
B. exactly the same quality as the black one
C. worth no more than $ 25,000
D. exactly as big and nice as the black one
4. Many people answered the advertisement because they wanted _______.
A. to see the perfect pearl
B. to buy some beautiful pearls too
C. to get in touch with the rich man
D. to sell their own pearl at a high price
5. The jeweler couldn’t find the man anywhere because ______.
A. he died suddenly.
B. He happened to be out
C. He got $ 20,000 by cheating and had run away with the money.
D. He wouldn’t show up until the jeweler called him a second time.