Joe is interested in getting exercise an...

假设你的名字叫李华，正在伦敦某中学做交换生。校友Chris正筹划一场关于中国文化的演出活动，但他在演出内容方面遇到了瓶颈，因此来信向你求助。请你给他写封回信，内容包括：

1. 说明写信目的；

2. 提出建议；

3. 表示期待。

注意：1. 词数100左右，开头语和结尾语已为你写好；

2. 可以适当增加细节，以使行文连贯；

Dear Chris,

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours sincerely,

Li Hua

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、删除或修改。

增加：在缺词处加一个漏词符号（∧），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。

This morning when I got into the taxi I have booked,I noticed it was a same gentleman that had

taken me back home last week. I still remembered that we'd talked about. He said he thought somebody

would care,so he felt surprised and was happily to know I still remembered him. He said he began to swim to lose weight,but he did it every morning before start work. I told him that swimming was one of the greatest way to keep us healthy and it also had positive effeets on our brains,too. He said he knew it was a good way avoiding depression and that he would keep on doing it all the time.

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

I'm a Muslim. Once I was eating at a restaurant,where there was a father 1.（seat)next to my desk with his two girls. I 2.（overhear)their conversation. The girls were 3.（constant)asking about everything and anything. And I was fascinated by their 4.（curious).

One of the girls looked at me and asked,"Daddy,why is she wearing that way?"Her dad responded 5. something that made my heart so warm. He said,"There are different religions,cultures and languages. We have to respect and learn about them. "He then went on 6.（share)his personal experience of living abroad and learning to speak Spanish.

This reminded me of a Harvard study that I had read about. Children who 7.（expose)to racism tend to accept and embrace 8.as young as age 3,and in just a matter of days. Only at that time did I realize the importance of the way we teach children about love,acceptance,understanding and respect. It should start from an early age. The 9.（early),the better. Kids imitate their parents' views and behaviour. It is you 10.are their role model.

    During the winter vacation,I was involved in an image-processing project. My task was to extract（提取）the shape of every cell from a(n)__ of microscope images. It seemed quite straightforward at first,but it turned out to be __.

Since I did not have any experience in image processing,I studied some basic ___on my own and started to use a very popular function library(函数库）called OpenCV. As the time was __,I just learnt to apply techniques without going into the mathematical rationale(原理）。As a result,I didn't complete the task in an efficient way and____lots of time.

Through this project,I got a good __ of the importance of studying the basic knowledge. I will probably ___to spend more time studying the theory before I ___another project. By learning their underlying mechanisms(机制），I will be able to ___the tools to suit my own needs. In this way,1 may achieve___ results.

Another challenge I met was about the brightness setting. When I sketched(勾勒）the __ of the cell by the computer,I first set the brightness value to 50,___that the computer could delete the dark places and extract the shape of the cell___. But it turned out that the standard didn't fit for every image. So 1____the brightness value to 30,but that didn't __ either. It was very hard to find a value that worked for all ____

From this,I began to appreciate human eyes. Our eyes ___the amount of light entering them automatically through a feedback system to achieve the best image representation,but computers are not that __. There is still so much that we don't know about the human body.

In summary,I think it is good for students to be involved in real projects___ they can begin to learn about various fundamental ___and get themselves ready for the future.

1.A.collection B.addiction C.measurement D.accumulation

2.A.simple B.dangerous C.skeptical D.challenging

3.A.items B.techniques C.concepts D.contents

4.A.limited B.previous C.permanent D.equal

5.A.saved B.postponed C.appreciated D.wasted

6.A.use B.sense C.knowledge D.belief

7.A.enjoy B.decline C.choose D.demand

8.A.turn down B.set about C.put forward D.make out

9.A.evaluate B.settle C.dispose D.handle

10.A.better B.quicker C.easier D.closer

11.A.character B.figure C.movement D.outline

12.A.declaring B.requiring C.hoping D.recommending

13.A.automatically B.willingly C.deliberately D.rapidly

14.A.attached B.applied C.changed D.appealed

15.A.work B.solve C.achieve D.gain

16.A.results B.images C.places D.theories

17.A.absorb B.accept C.adjust D.delete

18.A.accessible B.ambitious C.fashionable D.intelligent

19.A.when B.because C.although D.unless

20.A.conclusions B.functions C.systems D.principles

    X-rays are high energy waves that are invisible. 1.For example,doctors can see inside the human body and security guards at airports can see inside your handbag. In 1895,the German scientist,Wilhelm Rontgen,discovered X-rays by accident. He called them X-rays because he hadn't seen such a form of radiation before. 2.Wilhelm took the first X-ray picture of the bones of his wife's hand after the discovery. In 1901,he received the first Nobel Prize in Physics for his discovery.

X-rays are valuable in medicine because then can see through certain parts of the body. Doctors can take pictures to see which bones are broken or to find out which teeth have holes. The X-rays are strong enough to pass through the skin and muscles,but they cannot pass through hard objects like bones. In the picture,hard objects like bones are white area3.

There are some situations in which X-rays cannot give you a clear picture. Some organs,for example,may prevent X-rays from showing a broken bone. For this reason,computed tomography(CT)was invented. A person is put inside a scanner,which is a large tube-shaped machine. 4. A computer puts together all of these images,which can show doctors more than a normal X-ray can.

5.Patients must wear protective clothing for the parts of their body that are not X-rayed. Doc- tors and helpers who work with X-ray machines must wear lead aprons and stand behind screens.

A.Then the person is X-rayed from all sides.

B.Objects that X-rays go through appear dark.

C.In mathematics,X means something unknown.

D.An X-ray machine is used to take these pictures.

E.X-rays,however,can also do harm to your body.

F.However,they can be an essential tool for finding out what's wrong with you.

G.They are useful because they can pass through many things that normal light cannot.