If music makes you smarter and exercise helps you to think, surely exercising to music can turn you into an intelligent person.

A team of scientists from Ohio State University did experiments on 33 volunteers who were getting better from heart disease following operation. They found that people who exercised while listening to Italian musician Antonio Vivaldi’s “The Four Seasons” did much better on language ability tests than without music.

“Facts suggest that exercise improves the learning ability of people with heart disease,” said the psychologist Charles Emery, who led the study. “And listening to music is thought to enhance understanding. We just wanted to put the two results together,” he added.

The volunteers said they felt better emotionally and physically after working out with or without the music. But their improvement on the test doubled after listening to music during exercise. Scientists have proved that music can be good for health, education and well-being. It helps reduce stress, sadness and nervousness; encourages relaxation or sleep; wakes up the body and improves memory and thoughts.

In medical fields, music is used widely for patients who have had head hurts before and after operation. “The Four Seasons” was used because of its moderate tempo（舒缓的节拍）and positive results in earlier research. “Exercise seems to cause positive changes in the nervous system(神经系统) and these changes may have a direct result on learning ability,” Emery said.

Scientists have been studying the results of music on understanding since the early 1950s. By 2000, psychologists were using Mozart’s music, especially his violin pieces, to help children with speech disorders. Mozart was chosen because his music is not overexciting and has clear structures. A study showed students who listened to Mozart went on to score higher marks in an intelligence test. With important exams drawing near, your parents will not probably allow you to listen to music. But perhaps now you have good reasons to argue with them.

1.The underlined word enhance can be replaced by ______.

A．impress           B．improve           C．provide           D．produce

2.The text mainly tells us that _____.

A．music and exercise lead to relaxation or sleep

B．33 volunteers work on music in medical fields

C．exercising to music makes people healthy and bright

D．scientists give suggestions on choosing music to exercise to

3.It can be learned from the last paragraph that ______.

A．you are supposed to follow your parents’ words

B．students should not listen to music before exams

C．you have some good reasons to exercise to music

D．music might help you to get higher grades in tests

4.Which of the following statements is true?

A．Exercise seems to cause negative changes without music.

B．Exercise reminds people with head hurts of what they’ve learned.

C．Scientists often use Mozart’s music, for it is not too exciting.

D．“The Four Seasons” is used to help children with speech disorders.

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

The computer, which was used to simplify difficult sums, began     31    a calculating machine in France in 1642. Then it developed into an analytical machine. After       32     (program) by an operator      33     used cards with holes, it could produce an answer quicker than any person. Later, Alan Turning wrote a book about how a computer could be made     34    work as a “universal machine”. From then on, the computer grew rapidly both in size and in brainpower. By the 1940s, it had grown as large as a room and this reality worried the designers.     35    , with its memory     36    (improve), the computer was made smaller. First, the memory was stored in tubes, then on transistors and later on very small chips. As a result, the shape of the computer      37     (total) changed from a large machine to a PC and then a laptop. Connected by    38    network, the computer was able to share its knowledge     39     others through the World Wide Web. Since the 1970s many new applications of the computer      40      (find) in communication, finance, trade and many other areas. The computer has become a devoted friend and helper of the human race.

__46   People use money to buy food, furniture，books，bicycles and hundreds of other things they need or want. When they work, they usually get paid in money．

Most of the money today is made of metal or paper．  47   One of the first kinds of money was shells．

Shells were not the only things used as money．In China，cloth and knives were used. In the Philippine Islands, rice was used as money for a long time. Elephant tusks，monkey tails and salt were used as money in parts of Africa．

The first metal coins were made in China, They were round and had a square hole in the centre．  48   

Different countries have used different metals and designs for their money．  49   Sweden and Russia used copper(铜) to make their money. Later some countries began to make coins of gold and silver.

But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money．__ 50   The first paper money looked more like a note from one person to another than the paper money used today.

Money has an interesting history from the days of shell money until today．

 A．Today anyone will accept money in exchange for goods and service．

B．The first coins in England were made of tin(锡)．

C．But people used to use all kinds of things as money．

 D．Money, as we know, is all made of paper.

E．They began to use paper money.

F.  People strung(串连) them together and carried them from place to place．

G．No one knows for certain when people began to use money．

The computer was used in teaching. As a result，not only _____，but students became more interested in the lessons.

A．saved was teachers’ energy              B．was teachers’ energy saved

C．teachers’ energy was saved              D．was saved teachers’ energy

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处，每处错误仅涉及一个单词的增加，删减或修改。
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注意:  1.每处错误及其修改均仅限一词;
2.只允许修改10处,多着(从11处起)不记分
My hair was used to be very long.I dreamed of donating it to sick children which had lost their hair. My teacher has donated her hair, so I wanted to donate mine, either. My dream came true last Christmas. After I told my teacher I was ready donate my hair, she praised me. Then we paid the visit to a hairdresser.The hairdresser cut 20 inch from my long hair and styled what was left. It was hard to say good-bye to my hair, so to help others made me feel happily. Now some of my friends are growing their hair long so that they can donate them this year.