Five cloned pigs，whose organs are much less likely to be rejected(排斥) by a patient，have been born in the U．S.
More than 62,000 people in the U．S. alone are waiting to ____ donated hearts，lungs and so on.The number of human donors falls far short of ____.Pig organs are of a(n) ____ size to human organs，and some scientists hope they might be used to help meet the ____.But previous attempts to transplant pig tissue into humans have ____.
The five pigs ____ a gene that adds a sugar to the surface of pig cells.The sugar would ____ immune(免疫的) rejection of the tissue.“This advance provides a neartime ____ for overcoming the problem that there is not enough human organs for transplants，”says an expert.“This is the ____ gene for overcoming the ____ stage of rejection.”
____，scientists warn that much more work is necessary ____ organs from copies of the pigs could be transplanted into humans.Human genes will need to be added，to ____ rejection of the organ in the long term.There are also ____ that pig viruses could infect patients.
Cloning techniques were ____ to the production of the pigs.Genes can only be knocked out(去除) in a single cell.Cloning of these single cells then allowed the ____ of a whole animal in which the gene was knocked out in every cell.But the PPL researchers have ____ in knocking out only one copy of the gene.The team will now attempt to knock out both copies of the gene.
The team will also ____ tests to investigate whether a virus from the pigs could infect human cells.“Although a lot of the work is very ____，we’re still very far off being able to grow an organ，” says Julia，who is working on this project and quite ____ to creating similar knockout pigs with researchers at the University of Missouri.
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【小题1】C
【小题2】D
【小题3】A
【小题4】B
【小题5】C
【小题6】A
【小题7】C
【小题8】D
【小题9】A
【小题10】C
【小题11】B
【小题12】C
【小题13】A
【小题14】D
【小题15】A
【小题16】B
【小题17】A
【小题18】B
【小题19】C
【小题20】D
解析【小题1】 D
解析 由本段内容可知，应是等待接受器官的移植。
【小题2】 B
解析 器官捐献不能满足人们的需求，demand符合语境。
【小题3】 C
解析 根据上下文可知，克隆猪的器官可以被移植到人体内，它们的器官应该和人类的器官大小相似。
【小题4】 A
解析 根据本段第二句“The number of human donors falls far short of ____.”可知，克隆猪的器官是为了弥补人类可移植器官的不足。
【小题5】 B
解析 上一句提到科学家期望克隆猪的器官能够应用于人类器官移植领域，but表示转折，说明以前类似的试验失败了。
【小题6】 A
解析 由下文“...a gene that adds a sugar to the surface of pig cells.The sugar would ____ immune(免疫的) rejection of the tissue.”可推测，这一基因会导致不好的结果，又根据“‘This advance provides...’”可知，这五只克隆猪没有这一基因，因此选lack。
【小题7】 B
解析 根据上下文可知，这种糖分可能会使器官产生免疫排斥，cause符合语境。
【小题8】 D
解析 根据后面overcoming the problem的提示，可知对人类可移植器官不足的问题提供了一个解决办法。
【小题9】 C
解析 根据上文“...a gene that adds a sugar to the surface of pig cells.”可知，这一基因对克服器官排斥问题很关键，所以选key。
【小题10】 D
解析 根据下一段第二句“Human genes will need to be added，to ____ rejection of the organ in the long term.”可知，对这一基因的处理只能解决器官排斥早期的一些问题。
【小题11】 A
解析 根据下文“...scientists warn that much more work is necessary...”可知，本段内容与上一段意思是转折关系，所以用however。
【小题12】 B
解析 根据下文“Human genes will need to be added...”可知，在克隆猪的器官可以移植到人体内之前，还有很多工作要做，所以用before。
【小题13】 A
解析 根据上下文可知，科学家们的这些工作是为了防止器官排斥。
【小题14】 C
解析 由句意可知，猪身上的病毒可能会感染病人，这是人们所担心的。
【小题15】 B
解析 这五只猪是克隆动物，显而易见，克隆技术对繁育出这几只猪至关重要，vital符合语境。
【小题16】 D
解析 基因的去除只有在单个细胞中才能进行，克隆这些单细胞然后再将其培育成一只完整的动物，这样动物身上的每个细胞中的这种基因就都被去除了，creation符合语境。
【小题17】 B
解析 根据下文“The team will now attempt to knock out both copies of the gene.”可知，PPL researchers已经成功去除这种基因的一个副本。
【小题18】 A
解析 句意为：这一团队还将进行试验研究克隆猪身上的细菌是否会感染人体。conduct tests进行试验。
【小题19】 C
解析 although表示让步，根据主句“‘we’re still very far off being able to grow an organ，’”可知，exciting符合语境。
【小题20】 C
解析 Julia致力于培育这种去除基因的克隆猪，devoted符合语境。
阅读快车系列答案科目：高中英语 来源： 题型：完型填空
There was a wonderful old man who loved everything.
One day while walking through the woods, the nice old man a cocoon（茧）. He to take the cocoon home to watch its from a little cocoon to a beautiful butterfly.
He softly placed the cocoon on his kitchen table and it for days.
One day the cocoon started to move. It moved quickly! The old man felt for the little butterfly inside. He watched it struggle（挣扎）and struggle! So he softly cut the cocoon with a knife so the butterfly could more quickly. The butterfly broke free from its cocoon, couldn’t move at all.
The old man didn’t know why and decided the thing he could do for the butterlfy was to place it softly back into its cocoon.
He placed a drop of honey on it to the cocoon, leaving the butterfly in its state.
The next day he noticed that the cocoon was moving . It struggled and struggled. the butterfly broke free from its cocoon. Its beautiful wings were filled with wonderful colors! It took off! It was !
That wonderful butterfly flew and flew till it was out of the old man’s sight. What a ! He shouted. But then he started to think. What did I do at first? The old man went to the library and read every he could find on butterflies and cocoons.
Finally the appeared. The butterfly has to struggle while the cocoon. That’s how it gets its strength（力量）. That’s just why they are created to in order to be strong and beautiful.
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科目：高中英语 来源： 题型：完型填空
阅读下面短文，掌握其大意，然后从各题所给的四个选项(A、B、C和D)中，选出最佳选项。
One day, a poor boy，named Howard Kelly，was trying to pay his way through school by selling goods door to door．He was hungry，31 he decided to beg something to eat．
When a young woman opened the door，instead of a 32 he asked for a drink of water．Thinking he looked 33 she brought him a large glass of milk．He drank it and then asked，“How much do I 34 you?”
“No．you don’t owe me anything，”she replied．“Mother has taught me 35 to accept pay for a kindness.”Leaving that house, he not only felt stronger 36 ，but it also increased his faith in God and the human race．He was about to 37 before this point．
38 later the young woman became seriously i11．The local doctors couldn’t cure her illness．They sent her to the big city，where specialists can be 39 to study her disease．Dr．Howard Kelly, now 40 ，came for the consultation(会诊)．When he heard the name of the town where she came from, a strange light filled his eyes． 41 ，he went into her room．
42 in his doctor’s gown (罩衣) he went in to see her．He 43 her at once．He went back to the 44 and determined to do his best to save her life．From that day on，he gave special attention to her case．
Finally，the battle was won．Dr．Kelly asked a nurse to 45 the bill to her room．She was afraid to open it 46 she knew that it would 47 the rest of her life to pay it off．Finally she looked and read these words on the side of the bill：
“Paid in full with a glass of 48 ．”(Signed Dr．Howard Kelly.)
Tears of 49 flooded her eyes as she 50 silently：“Thank you，God．Your love has spread through human hearts and hands．”
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科目：高中英语 来源： 题型：完型填空
Even though it was only October, my students were already whispering about Christmas plans. With each passing day everyone became more __36__, waiting for the final school bell. Upon its _37____everyone would run for their coats and go home, everyone except David.
David was a small boy in ragged clothes. I had often _38___what kind of home life David had, and what kind of mother could send her son to school dressed so __39_ for the cold winter months, without a coat, boots, or gloves. But something made David __40_. I can still remember he was always __41____a smile and willing to help. He always _42__after school to straighten chairs and mop the floor. We never talked much. He__43___just simply smile and ask what else he could do, then thank me for letting him stay and slowly__44___home.
Weeks passed and the __45___over the coming Christmas grew into restlessness until the last day of__46__before the holiday break. I smiled in ___47 __as the last of them hurried out the door. Turning around I saw David ___48___standing by my desk..
“I have something for you ”he said and ____49____from behind his back a small box .__50___it to me, he said anxiously, “Open it ”I took the box from him ,thanked him and slowly unwrapped it. I lifted the lid and to my __51__, I saw nothing. I looked at David’s smiling face and back into the box and said,“The box is nice ,David ,but it’s__52__”.
“Oh no, it isn’t”said David.“It’s full of love. My mum told me before she died that love was something you couldn’t see or touch unless you know it’s there.”.
Tears filled my eyes ___53___I looked at the proud dirty face that I had rarely given____54___to. After that Christmas, David and I became good friends and I never forgot the meaning ___55___the little empty box set on my desk .
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科目：高中英语 来源： 题型：完型填空
Research has shown that two-thirds of human conversation is taken up not with discussion of the cultural or political problems of the day, not heated debates about films we've just watched or books we've just finished reading, but plain and simple ____.
Language is our greatest treasure as a species, and what do we ____ do with it? We gossip. About others' behaviour and private lives, such as who's doing what with whom, who's in and who's out-and why; how to deal with difficult ____ situations involving children, lovers, and colleagues.
So why are we keen on gossiping? Are we just natural ____, of both time and words? Or do we talk a lot about nothing in particular simply to avoid facing up to the really important issues of life? It's not the case according to Professor Robin Dunbar. In fact, in his latest book, Grooming, Gossip and the Evolution of Language, the psychologist says gossip is one of these really____issues.
Dunbar ____ the traditional view that language was developed by the men at the early stage of social development in order to organize their manly hunting activities more effectively, or even to promote the exchange of poetic stories about their origins and the supernatural. Instead he suggests that language evolved among women. We don't spend two-thirds of our time gossiping just because we can talk, argues Dunbar—____, he goes on to say, language evolved specifically to allow us to gossip.
Dunbar arrived at his cheery theory by studying the ____ of the higher primates（灵长类动物）like monkeys. By means of grooming--cleaning the fur by brushing it, monkeys form groups with other individuals on whom they can rely for support in the event of some kind of conflict within the group or____ from outside it.
As we human beings evolve from a particular branch of the primate family, Dunbar ____ that at one time in our history we did much the same. Grouping together made sense because the bigger the group, the greater the ____ it provided; on the other hand, the bigger the group, the greater the stresses of living close to others. Grooming helped to ____ the pressure and calm everybody down.
But as the groups got bigger and bigger, the amount of time spent in grooming activities also had to be ____ to maintain its effectiveness. Clearly, a more ____ kind of grooming was needed, and thus language evolved as a kind of vocal（有声的）grooming which allowed humans to develop relationship with ever-larger groups by exchanging information over a wider network of individuals than would be possible by one-to-one ____ contact.
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科目：高中英语 来源： 题型：完型填空
At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were to show that we all have “a body clock” us, which controls the and fall of our body energies, us different from one day to the next.
The of “a body clock” should not be too since the lives of most living things are controlled the 24 hour night-and-day cycle. We feel and fall asleep at night and become and energetic during the day. If the 24 hour-cycle is , most people experience unpleasant . For example, people who are not to working at night can find that of sleep causes them to badly at work.
the daily cycle of sleeping and , we also have other cycles which longer than one day. Most of us would that we feel good on some days and not so good on ; sometimes our ideas seem to flow and at other times, they do not exist.
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科目：高中英语 来源： 题型：完型填空
Cultural differences occur wherever you go. When visiting another country, you should be aware of those differences and _______ them. Here are some _______ on how to fit in.
Every traveler to a foreign country feels _______ at some point. What you do can make locals laugh. Your best defense is a sense of _______. If you can laugh off eating with the wrong hand in India, locals will warm to you as “that crazy foreigner.”
Wearing proper cloths is important too, _______ locals will judge by what you wear. In some Middle Eastern countries, exposing your flesh is _______, especially if you are a woman. So leave your torn jeans at home.
Also be cautious about expressing _______. Getting angry in Southeast Asia just makes you look silly. In some countries it is _______ to kiss in public.
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科目：高中英语 来源： 题型：完型填空
When I walk through the streets of San Francisco’s business districts, white people stare at me as if I were a circus clown.
Their staring eyes don’t see that I get ________ A’s in school, or that I am a captain of the football team, or that I belong to ______youth organizations. All they see is that I am 6-foot-4, young, black, and male---a potential _______to them.
White men look at me as if I am up to no good, or as if they are ________to me. White women just look at me with________, say, sometimes they cross the street when they see my friends and me coming, or walk in the street and only get back on the sidewalk after we ________.
Many people come to San Francisco to get away from the stereotypes(成见) of the cities they were born and ________ in. The majority of the blacks and Latinos who live in this city don’t have that luxury.
How can you feel at home when people are__________telling you to get back to Africa or Mexico ----or just back to “where you belong”?
My way of dealing with this kind of thing has ________over the years. In the past, when my friends and I would walk the streets and a hundred pairs of white eyes would look at me as if we were the lowest form of dirt, it would make us angry enough to hurt or _______them.
Now I’m more likely to use ________ to defend myself against those eyes. To women who clutch their purse in terror, I’ll say, “Man, I ain’t gonna do anything to you, I got money in my pocket!” My cousin has even started wearing a T-shirt _______ in big letters, “NO, WHITE LADY, I DON'T’ WANT YOUR PURSE.”
The most painful thing is when we get those______ stares from black people, especially elderly ones. I want o say to them, “We’re black, too. Why would we do something to you?”
Usually I react more _______to all of this than a lot of my friends do. Some of them, so brainwashed, just think it’s part of life and that there is nothing you can do.
But for me, that’s not good enough. I just can’t stand it when every day a hundred pair of eyes tell you you’re not__________.
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