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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。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（﹨）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1、每处错误及其修改均仅限一词。

2. 只允许修改10处，多者（从第11处起）不计分

As we all know that, teachers are very important to us. They not only open our eye to a wonderful world of knowledge, but also teach us how behave. It is undoubted that they are worth of our respect. We should always be grateful to them. Therefore, we ought obey the school rules. We should come to school in time and not make some noise in class when our teacher is conducting out the lesson. That is the more necessary and easiest thing which the students should do. Only by doing so can we show our really respect to our teachers.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

  51. It crossed New York from Buffalo on Lake Erie Troy to Albany on the Hudson River. 52 . The canal served as a route over which industrial goods could flow into the west, and materials could pour into the east. The Erie Canal helped New York develop into the nation's largest city.

The building of the canal was paid for entirely by the state of New York. 53  Between 1825,when the canal was opened ,and 1882,when toll charges(过运河费) were stopped ,the state collected $121,461,891.

For a hundred years before the Erie was built, people had been talking about a canal which could join the Great Lakes and the Atlantic Ocean. The man who planned the Erie Canal and carried the plan through was De Clinton. Those who were against the canal laughingly called it"Clinton' Ditch(沟).  54 . He and Governor Morris went to Washington in 1812 to ask for help for the canal, but they were unsuccessful.

Clinton became governor of New York in 1817,and shortly afterwards, on July 4,1817,broke ground for the canal in Rome, N.Y. The first part of the canal was completed in 1820. 55  . The length of the canal is 363 miles.

E. Clinton talked and wrote about the canal and drew up plans for it.

F. To dig the canal benefited Americans.

G. It joined the Great Lakes with the Atlantic Ocean.

Because plants cannot move or talk, most people believe that they have no feelings and that they cannot receive signals from outside. However, this may not be completely true.

People who studied plants have found out that plants carry a small electrical charge (电荷). It is possible to measure this charge with a small piece of equipment called “galvanometer”. The galvanometer is placed on a leaf off the plant, and it records any changes in the electrical field of the leaf. Humans have a similar field which can change when we are shocked or frightened.

A man called Backster used a galvanometer for his studies of plants and was very surprised at his results. He found that if he had two or more plants in a room and he began to destroy one of them － perhaps by pulling off its leaves or by pulling it out of its pot － then the galvanometer on the leaves of the other plants showed a change in the electrical field. It seemed as if the plants were signalling a feeling of shock. This happened not only when Backster started to destroy plants, but also when he destroyed other living things such as insects (昆虫).

Backster said that the plants also knew if someone had destroyed a living thing some distance away, because they signalled when a man who had just cut down a tree entered the room.

Another scientist, named Sauvin, achieved similar results to Backster’s. He kept galvanometers fixed to his plants all the time and checked regularly to see what the plants were doing. If he was out of the office, he telephoned to find out about the signals the plants were sending. In this way, he found that the plants were sending out signals at the exact times when he felt strong pleasure or pain. In fact, Sauvin could cause a change in the electrical field of his plants over a distance of a few miles simply by thinking about them.

1.Backster was surprised at the results of his studies because _____.

2.The plants sent out signals _____.

3.The scientist called Sauvin _____.

4.Which of the following is true according to the passage?

Advertising is a highly developed twentieth-century industry. The development of radio, television, cinema, magazines and newspapers has gone hand in hand with the development of advertising. Why is advertising so popular? Is it a waste of money? It has been proved again and again that repeated advertising increases product sales. Since it increases production, the price can be reduced. Therefore advertising, instead of making a product more expensive, makes it cheaper.

Advertising is now a scientific business. Once managers would say jokingly, " I know that half of what I spend on advertising is wasted, but I don't know which half." Now, all parts of an advertising program are properly measured and researched.

What makes a good advertisement? There have been major changes in advertising in the past sixty years. People read advertisements partly for information and partly for pleasure. Today's advertisements often start with a question, or a puzzle, with the purpose of attracting the reader's attention. Of course, most advertisements contain information. But this is usually contained in a text that is interesting and often funny. Humor is very important. Sometimes advertisements tell a story, or the story may be continued over a number of advertisements. However, there is a danger in this. It is possible that the reader or viewer will remember the advertisement but not the name of the product.

1.The purpose of advertising is ____.

2.Which of the following can be used in place of the underlined phrase "hand in hand" ?

3. What is meant by what managers said in the second paragraph?

4.What does the writer think of advertising?

Cara Lang is 13. She lives in Boston, Massachusetts, in the U. S. Last Thursday, she didn't go to school. She went to work with her father instead. Every year, on the fourth Thursday in April, millions of young girls go work. This is Take Our Daughters to Work Day. The girls are between the ages of 9 and 15. They spend the day at work with an adult, usually a mother, father, aunt, or uncle. They go to offices, police stations, laboratories, and other places where their parents or other family members work. Next year, the day will include sons, too.

The Ms. Foundation, an organization for women, started the program about ten years ago. In the U.S., many women work outside the home. The Ms. Foundation wanted girls to find out about many different kinds of jobs. Then, when the girls grow up, they can choose a job they like.

Cara's father is a film director. Cara says, “It was very exciting for me to go to the studio with my dad. I saw a lot of people doing different jobs.” Many businesses have special activities for girls on this day. Last year, Cara went to work with her aunt at the University of Massachusetts. In the engineering department, the girls learned to build a bridge with toothpicks and Candy. In the chemistry department, they learned to use scales. They learned about many other kinds of jobs, too.

Right now, Cara does not know what job she will have when she grows up. But because of Take Our Daughters to Work Day, she knows she has many choices.

1.What is Cara's father?

2.According to the passage, Take our Daughters to work Day is ______.

3.On this special day, Cara has done all the following EXCEPT that ____.

4.What is probably the best title for the passage?