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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出语言错误。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：在缺词处加一个漏字符号（），并在其下面写出该加的词。

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2.只允许修改10处，多者（从第11处起）不计分。

May 10,2009                                              Fine

Today I was having a PE lesson while I fell down and hurt my foot. I was in greatly pain at that moment,     but I tried to act as if nothing has happened until the class was over. Though I had difficulty walk back to my classroom, I still didn’t tell anyone but even refused the offer of help of my classmates. As result, the hurt in my foot become worse. Now I know I was wrong. We can tell others our need for help and accept his help. Some day we can not help others in return. In this way, we can get along to each other happily and peacefully.

患儿，18个月。自8个月起多次患肺炎、中耳炎和脓疱病，为寻找病因家长带其到医院就诊，查体时发现患儿扁桃体缺如，血常规正常。

医生为明确诊断作了有关的实验室检查，与该病诊断无关的是（）

A.血清免疫球蛋白测定

B.白喉毒素试验

C.结核菌素试验

D.同族血型凝集素测定

E.淋巴结活检，查找浆细胞

     People have often wondered about Margaret Thatcher's famous claim that she only needed four

hours of sleep a night. People were amazed that former British Prime Minister had managed to run the

country on so little sleep. Most people need at least seven or eight hours rest every night.

     But now scientists have discovered a gene(基因)that affects the amount of sleep we need and which

allows some people to survive on fewer hours. They found a mother and a daughter who have a rare

gene that allows them to sleep less than the rest of their family -but still feel alert during the day. The pair

managed to stay alert on about six hours sleep a night, two hours less than the rest of their family needs.

     The finding, published in Science magazine, offers a new direction for studies on how sleep affects

health. Experts say adults need seven to nine hours of sleep for good health, while teenagers and kids

need more. People who don’t get enough sleep are more likely to get sick and suffer from memory loss.

     In 2001,scientists at the University of California discovered a mutation(突变)in a gene that causes

people with that gene to have very unusual sleeping patterns. These people go to bed around 7:30 pm

and wake around 3:30 am.

     Now the team has found a gene that affects how long a person can stay asleep. In the family they

studied, the 69-year-old mother and her 44-year-old daughter usually went to bed around 10 pm. The

mother woke up around 4 am, and her daughter woke up around 4:30 am. Both of them felt fully rested.

     Blood tests showed the women have a mutation in a gene named DEC2, which regulates the body's

clock.

     Researcher Ying-Hui Fu bred(培育) mice and fruit flies to carry the mutation. The flies and mice with

the mutation slept less than ordinary flies and mice, and needed less time to recover from little sleep.

1. What is the main idea of the passage?

A. Less sleep does not affect people's health.

B. Different people have different sleeping patterns.

C. New measures can reduce the effect of less sleep on health.

D. The hours we need to sleep may be affected by some gene in our body.

2. The underlined word "alert" in Paragraph 4 is similar in meaning to        .

A. comfortable

B. wide awake

C. quite alive

D. sleepy

3. In the study, the mother and the daughter       .

A. were found to have a mutation in the gene DEC2

B. were asked to sleep less than other family members

C. had the same sleeping pattern as other family members

D. suffered from memory loss for sleeping only six hours a night

4. According to the passage, the new finding can help       .

A. recover memory loss

B. cure sleeping problems

C. get rid of mice and fruit flies more easily

D. explain why some people need less sleep to feel fully rested

发热1周出疹（）

A.伤寒

B.幼儿急疹

C.麻疹

D.风疹

E.单纯疱疹

在性反应周期中，历时最短的是（）。

A.性兴奋期

B.性持续期

C.性高潮期

D.性消退期