【题目】阅读理解。

One in five people carry a “smart gene” variant(变体)linked to long lifespan,bigger forebrains and enhanced mental ability,researchers have found.

“We’ve known for a long time that people lose cognitive(认知) abilities as they age,but now we’re beginning to understand that factors like KLOTHO can give people a boost in aging.Genetic variation in KLOTHO could help us predict brain health and find ways to protect people from the diseases that happen to us as we grow old,like Alzheimer’s disease(老年痴呆症),” said senior author,Dena Dubal of University of California.

The KLOTHO gene affects a protein found in the kidneys and the brain that regulates many different body processes.About one in five people carry a single copy of the variant,known as KL-VS,which boosts levels of the protein and is associated with a longer lifespan and improved heart and kidney function.A small minority,3% of the population,has two copies,which is linked to a shorter lifespan.

In the new study scientists scanned the brains of 422 men and women aged 53 and over who were also tested for the KLOTHO gene.They found that participants with a single copy of the gene variant also had a larger brain region known as RDLPFC,which is especially likely to shrink with age.Loss of neurons in this area may be one reason why older people are sometimes easily distracted and find it difficult to do more than one task at the same time.

Researcher Dr Jennifer Yokoyama said,“The brain region enhanced by genetic variation in KLOTHO is vulnerable(脆弱的)in aging and some mental disease.In this case,bigger size means better function.It will be important to determine whether the structure increase associated with carrying one copy of KL-VS can offset the cognitive(认知的)shortage caused by disease.”

People who have one copy of a variant KL-VS tend to live longer and have lower chances of suffering a stroke(中风),whereas people who have two copies may live shorter lives and have a higher risk of stroke.

【1】What can we learn from the second paragraph?

A.People’s cognitive abilities do not decline if people have KLOTHO.

B.With the clear understanding of KLOTHO,Alzheimer’s disease can be cured now.

C.Genetic variation in KLOTHO could be helpful in treating mental disease in elderly people.

D.Genetic variation in KLOTHO could lead people to suffer from Alzheimer’s disease.

【2】If a person carries two copies of the gene variant,he/she may .

A.have better kidney function

B.have a shorter lifespan

C.have a higher level of the protein in his/her body

D.suffer from some cognitive disease

【3】The reason why older people’s attention is easily distracted may be that .

A.they have fewer neurons in the RDLPEC

B.their brain region is too large

C.they have two copies of the gene variant

D.they have more neurons in the RDLPEC

【4】What does the underlined word “offset” in Paragraph 5 probably mean?

A.Prevent. B.Balance.

C.Keep. D.Promote.

【题目】下面文章中有5个段落需要添加小标题（第1—5题）。请从以下选项（A、B、C、D、E、F）中选出符合各段意思的小标题。选项中有多余选项。

A.The engine in your body．

B.The location, size and heartbeat of a heart．

C.What happens when the heart beats?

D.How does your heart work?

E. How do we know about the heart?

F.What can a doctor tell by feeling your pulse?

【1】_______ Your heart is sometimes called the engine or the motor in your body and sometimes called the pump．It works away, both day and night．First it pumps out some blood, rests for a few seconds, and then it pumps some more．In a normal day, the heart pumps about 2,500 gallons of blood from the auricles and ventricles．

【2】________ When your heart beats, it is pumping blood to all parts of your body．If you could examine your heart closely, you would see that it is really two pumps placed side by side, and working at the same time．Each pump has two parts, the upper part called the auricle(心房), and the lower part called the ventricle(心室)．The auricles receive the blood as it comes into them after it has been pumped through the body．The ventricles pump the blood out．The right one pumps the blood to the lungs and the left one pumps the blood to all other parts of the body．At the top and bottom openings of each ventricle are valves(阀门) which make the blood go in only one direction．

【3】______ Your heart is located in your chest, a little to your left．This heart of yours, which is about the size of your two fists held together, beats about 90 times a minute．A grown person’s heart beats about 60 to 80times a minute．The heartbeat is not just the same in all persons, and it is not the same in any one person at all times．

【4】_______ By using a stethoscope to listen to the heart, the doctor can tell whether your heart is beating evenly and whether the valves are closing tightly．The stethoscope makes these sounds so clear that the doctor can hear them easily．The stethoscope has an earpiece that he places on your chest and tubes that he places in his ears．The earpiece carries the sound of your heart’s beating along the tubes to the doctor’s ears, and it makes the sound seem much louder than it really is．The doctor could listen to your heartbeat by pulling his ears against your chest．

【5】_______ An easy experiment can help you understand what happens when the heart beats．You can do this experiment with a hollow rubber ball．Make a small hole in it, and fill the ball with water through the hole．When you squeeze the ball, you will notice how the water comes out in a spurt each time you squeeze．After each spurt the ball comes back to its round shape again．Something like this happens when your heart beats．The muscles in your heart grow smaller, or contract, and squeeze the blood out of the heart．Each time this happens, we say your heart is beating．Perhaps you have noticed that the doctor places his finger on the pulse in your wrist when you are ill．By doing this he can tell how fast your heart is beating．

【题目】阅读下面材料，在空白处填入适当的内容（不多于三个单词）或括号内单词的正确形式

I’m【1】only daughter of my parents, so they are worried【2】everything I do. For example,【3】I ride my bike, my parents won’t let me【4】(ride) by myself. They are afraid I might fall off my bike and hurt【5】. They are taking great trouble to support the bike, with my mother even【6】(carry) a first-aid box. I’m not free to ride and I often say【7】(angry), “why not let me ride alone?”

Now, most families have one child. Parents want to do everything for their children. This does no good【8】them. Too much love from parents may prevent children from【9】(be) independent. In my opinion, parents should let their children do【10】they should do alone.

【题目】---Mr．Johnson didn’t turn up at the meeting yesterday morning, did he?

--- No．We ____ till twelve o’clock．A whole morning was wasted．

A．had waitedB．have been waiting

C．are waitingD．were waiting

【题目】阅读理解。

One day,I received a call from a colleague.He was about to give a student a zero for his answer to a physical problem,while the student claimed a perfect score.I was elected as their arbiter(仲裁人).I read the examination problem,“Show how it is possible to determine the height of a tall building with the aid of a barometer(气压计).” The student had answered,“Take the barometer to the top of the building,attach a long rope to it,lower it to the street,and then bring it up and measure the length of the rope.The length of it is the height of the building.”

The student had really answered the question completely,but the answer didn’t confirm his competence in physics.I suggested the student try again.I gave him six minutes to answer the question,warning that the answer should show some knowledge of physics.Five minutes later,he said he had many answers and dashed off one,which read “Take the barometer to the top of the building and lean over the edge of the roof.Drop the barometer,timing its fall with a stopwatch,then use the physical formula(公式)to calculate the height of the building.”

At this point,my colleague had to accept it,and then the student made almost full marks.I couldn’t help asking the student what the other answers were.He listed many others,and then added,“Probably the best one is to take the barometer to the administrator and say to him,‘Sir,here is a fine barometer.If you tell me the height of the building,I will give it to you.’”

Then,I asked the student if he really did not know the conventional answer to this question.He admitted that he did,but said that he was fed up with high school and college instructors trying to teach him how to think.

The name of the student was Bohr who later was famous all over the world.He won the Nobel Prize in Physics in 1922.

【1】The student got a zero at the beginning because .

A.the teacher wasn’t satisfied with him

B.his answer wasn’t complete or correct

C.the teacher didn’t fully understand his answer

D.his answer didn’t show his knowledge of physics

【2】We know from the passage that .

A.the student knew the expected answer

B.the administrator told Bohr the height

C.the author preferred Bohr’s last answer

D.the teacher was a very stubborn person

【3】We can learn from the passage that .

A.instructors can teach students how to think

B.arbiters can help students to get high scores

C.students should be given more freedom in thinking

D.teachers should make students use physical formulas

【4】What was Bohr’s attitude toward his schooling?

A.Optimistic. B.Critical.

C.Approving. D.Pessimistic.

【题目】Letter One

Dear Editor,

After I finish my homework, I often go online and chat with my friends. Sometimes I play Internet games. But my parents hate to see me playing games on the computer. Maybe they have heard too much news about how QQ and Internet games harm children. Once I went to a net bar to play games after school. But after that I told my parents that I was playing basketball at school. I said so because I didn’t want to make them unhappy. I feel bad about it. However, I need to rest for a while by playing computer games after studying for a long time. I really want my parents to understand that. Do foreign parents do the same to their children? Please help me.

Li Ping, Nantong

Letter Two

Dear Li Ping,

I think it’s not strange for parents to keep their children away from anything bad. Foreign parents will do the same as your parents! They may not let their children watch TV for too long a time, or like your parents, they don’t want their children to play computer games.

Talk to your parents and be honest to them, I think. Tell them what you are doing and why you are doing so to make them understand you. It’s never good to do things behind your parents’ backs. They aren’t fools as you think sometimes! Our parents seem to know what is the best for us. Remember: to be honest is the best way.

Good luck,

Rebecca

【1】From the passage we can learn that Li Ping often ________.

A．talks to his friends on the Internet

B．plays basketball after school

C．plays computer games at home

D. chats online before doing his homework

【2】The boy goes online _____.

A. to get news about QQ

B. just to have a rest

C. to show that he hates study

D. just to find some friends

【3】The underlined sentence in Letter Two means “ _____ ”.

A. You must do everything in front of your parents

B. You must always listen to your parents carefully

C. You should tell your parents what you do before or after doing it

D. You should not do anything to make your parents worry about you

【4】The editor thinks _____.

A. children should play computer games secretly

B. playing computer games can be very helpful to children’s studies

C. children should be honest and try to make their parents understand them

D. foreign parents don’t care for their children as much as Chinese parents

【题目】阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

Energy goes from one plant or animal to another.A food chain shows how this energy moves.Each time an animal gets eaten,its energy is passed onto the animal that eats it.The food chain is very important because it keeps the balance of nature.If one part of the food chain disappears,it can affect all the other plants and animals.Any threat to the food chain is a threat to the environment’s biodiversity(生物多样性).The food chain helps keep animal populations in balance.However,if something happens to damage one of the links in the food chain,that balance is broken.If one animal becomes endangered,it puts all the animals above it at risk.

Some of the threats are natural,such as wildfires,hurricanes,tornados,floods and so on.But the biggest threats to the food chain come from you and me.These threats include overfishing,logging,farming,development,pollution,etc.The food chain is endangered anywhere humans have had an effect on the natural environment.

A recent study shows that the overfishing of large sharks is damaging the food chain along the US Atlantic coast.Canadian and American scientists say sharks are being killed in great numbers for their meat and fins(鳍).Now,not enough sharks are around to eat the cownose ray.The ray’s population has increased and they have eaten up the shellfish to the point where it has hurt commercial(商业的) fishing.

Many of us disturb the natural environment in our own backyards.It’s up to us to take care of the environment and try not to disrupt the natural food chain.If we don’t act responsibly,animals will start disappearing.

【1】What can we learn from Paragraph 1?

A.The food chain is not easy to be broken.

B.The energy of an animal usually disappears when it dies.

C.Increasing the links will not break the balance of nature.

D.Breaking the food chain is bad for the biodiversity of the environment.

【2】The study mentioned in Paragraph 3 proves that .

A.human activities can be a big threat to the food chain

B.we are all responsible for the breaking of the food chain

C.natural disasters are hard to break the food chain

D.hunting large sharks for meat is beneficial

【3】We can infer that the writer wrote this passage mainly to .

A.explain what the food chain is

B.tell us something interesting about nature

C.suggest that we stop eating meat to save animals

D.suggest that we should not disrupt the natural food chain

【题目】At the meeting, the boss announced that all things ________ into consideration, the planned trip would have to be called off．

A．takenB．taking

C．to takeD．being taken

【题目】短文改错

假如英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处错误，每句中最多有两处。错误涉及单词的增加、删除或修改。

增加：在缺词处加一个漏词符号∧，并在此符号下面写出该加的词。

删除：把多余的词用斜线\划掉。

修改：在错词下面划一横线，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。

People are not so honest that they once were. The temptation to steal is greater than ever before ---- especial in large shops. A detective recently watched a well-dressed woman who always went into a large store on Monday mornings. One Monday, there was fewer people in the shop than usual when the woman came in, but it was easier for the detective to watch her. The woman first bought for a few small articles. After a little time, she chose one of the most expensive dressed in the shop and hand it to an assistant who wrapped it up for him as quickly as possible. Then the woman simply took the parcel and walked out to the shop with paying. When she was arrested, the detective found that the shop assistant was her daughter. The girl ‘gave’ her mother the free dress once a week!

【题目】书面表达

假设你是李华。你的美国笔友Susan要在暑假来中国桂林参加一个文化交流活动。 她想提前了解一下这座城市的相关情况，写信向你询问，请根据以下提示信息，给她回一封信。

注意： 1. 词数100左右，开头和结尾已经给出，但不计入总数；

2. 可适当增加细节，以使行文连贯；

3. 参考词汇 象鼻山 Elephant Trunk Hill chilli sauce

Dear Susan,

I’m glad that you are coming to Guilin for an exchange program during the summer holiday.

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Yours

Li Hua