1、课时分层作业(十)语言知识练习固基础.单句语法填空1Its believed that taking a walk after supper is beneficial(benefit) to us.2Plastic bags take years to break down, so dont just throw them out.3Only a political solution could put an end to the violence(violent)4If everyone in the country knew(know) first aid，many lives woul
2、d be saved.5What struck me most in the movie was the fathers deep love for his son.6She told me an incredible(credible) story about his grandmother catching a thief.7Misunderstandings arising(arise) from lack of social communication may lead to serious problems.8The terrible storm will probably knoc
3、k out the electric service of the town.9Nobody wants to make friends with the boy suspected(suspect) of having stolen money.10Warned of danger in the street at night, she had to go home with a friend accompanying(accompany) her.单句改错1Its very difficult for his parents to cure him this bad habit.him后加
4、of2I found my father sitting in his chair, completely absorbing in a magazine.absorbingabsorbed3You may rely on that he will come to pick you up.that前加it4The reason why he gave for his coming late is that he wasnt informed of it.whythat/which或去掉why5Sometimes we cant resist persuaded to buy things we
5、 dont really need.persuaded前加being高考题型练习提能力.阅读理解AFour cloned sheep that are genetically the same as Dolly，the first cloned mammal，are still healthy even in old age，a new study found.The four sheep could be considered Dollys clone “sisters”“They have just reached their 9th birthday，which is age 70 in
6、 human years，”researchers who have been studying the sheep said.A detailed study of these four sheep and nine other cloned sheep that are not related to“the Dollies”found that the animals were healthy.All of the sheep were free from many diseases commonly found in older sheep，such as diabetes and hi
7、gh blood pressure，the study showed.Dolly was born in 1996 as the result of a lab technique called somaticcell neclear transfer(SCNT)，in which the nucleus(细胞核) from an adult cell is put into an egg cell that doesnt have a nucleus.This meant that Dolly was a clone，genetically the same as the adult she
8、ep from which the nucleus came.Such a development means a lot to the cloning field.Dolly lived to be 6.5 years old and died in 2003 from a type of lung cancer that is caused by a virus and affects sheep.Before her death，Dolly developed arthritis(关节炎)at a relatively young age and had trouble waking.T
9、his caused concerns that clones might be at increased risk for agerelated diseases，the researchers said.In the new study，13 cloned sheep underwent a series of health tests.The test results were normal for the sheeps age.Some of the sheep had signs of mild arthritis，but this would be expected in olde
10、r sheep and was not detrimental，so none of the sheep needed treatment for the condition，the researchers said.The cloning process itself comes with a high risk of death in the fetus(胎儿)But for the clones that survive，the new data suggests that“they are healthy and seem to age normally”【语篇解读】本文讲述了克隆羊多
11、莉及其“姐妹”的情况。研究发现，那几只跟克隆羊多莉的基因一样的克隆羊没有出现大的健康问题。1What do the findings of the new study mainly suggest?ASheep can be genetically the same.BCloned animals cant live longer than normal ones.CScientists can help prevent diseases in cloned animals.DCloned animals arent at a higher risk for agerelated health
12、 problems.D推理判断题。根据第一段的“the first cloned mammal，are still healthy even in old age，a new study found”可知，这个研究表明年龄大的克隆动物患病的几率并不会更高。2What do we learn about the sheep Dolly from the text?AHer birth led to the creation of SCNT.BHer birth was a great scientific achievement.CHer genes were unique when she w
13、as created.DHer genes were created using a normal technique.B推理判断题。根据第一段的“Dolly，the first cloned mammal”以及第三段的“Dolly was born in 1996 as the result of a lab technique called somaticcell nuclear transfer(SCNT)”可知，多莉的诞生是一个科学上的巨大成就。3When Dolly died，scientists most probably Abecame worried about the hea
14、lth of cloned animalsBthought her death was caused by old ageCfound a way to reduce the risk for agerelated diseasesDlost interest in cloning animalsA细节理解题。根据第四段的“This caused concerns that clones might be at increased risk for agerelated diseases”可知，多莉去世后，科学家们担忧克隆动物的健康问题。4What does the underlined wo
15、rd“detrimental”in Paragraph 5 mean?ANew.BPersonal.CHarmful.DRegular.C词义猜测题。根据画线词后面的“none of the sheep needed treatment”以及那些羊没有大的健康问题的语境，可知这里是指没有“危害性的”状况。BThe 1993 movie Jurassic Park wasnt the first film to show dinosaurs(恐龙) in the modern world.But it did a good job of bringing the idea of cloning
16、dinosaurs into popular culture.It represented dinosaur cloning in a way that made sense to a lot of people，and it was a successful film，making more than $900 million worldwide.Jurassic Park built on the idea of getting DNA from mosquitoes(蚊子) kept in amber.While this might seem possible at first sig
17、ht，its highly unlikely that scientists could find usable dinosaur DNA in mosquito fossils(化石)Scientists would need a very specific samplea female mosquito that had taken lots of dinosaur blood immediately before being trapped(困住) in amber.Since fossilization in amber is a relatively rare event，the c
18、hances of this happening are pretty small.The lack of possible samples isnt the only problem.Most insect fossils found in amber are also too young to contain dinosaur blooddinosaurs were gone by the time the insects became trapped.Many insects went bad from the inside out after they were trapped，lea
19、ving nothing inside for scientists to try to find.Finally，the sample would have to be very intact，since DNA can break down quickly in the presence of water.But if researchers did find a perfectly kept mosquito with a body full of dinosaur blood，bringing back its DNA would still be difficult.The bloo
20、d with the dinosaur DNA would be surrounded by the body of an insect，which has its own DNA.There could also be DNA from other cells trapped in the amber.Then，of course，theres the DNA in the laboratory itselfand in the body of the scientist.【语篇解读】本文是议论文。文章以电影侏罗纪公园引出克隆恐龙的话题，并论述了克隆恐龙的不可能性。5Why is the f
21、ilm Jurassic Park mentioned at the beginning?ATo lead into the topic of cloning dinosaurs.BTo encourage scientists to clone dinosaurs.CTo give a simple introduction to dinosaurs.DTo stress the possibility of cloning dinosaurs.A细节理解题。根据第一段中的“it did a good job of bringing the idea of cloning dinosaurs
22、 into popular culture”可知，作者提到电影侏罗纪公园很受欢迎是为了引出克隆恐龙的话题。6The key to cloning dinosaurs is to gain Ainsect fossilsBdinosaur DNACdinosaur bloodDmosquitoes in amberB细节理解题。根据第二段中的“Jurassic Park built on the idea of getting DNA from mosquitoes kept in amber.”可知，克隆恐龙的关键是获取恐龙DNA。7What is the authors opinion on
23、 cloning dinosaurs?AIt is a step away from success.BIt will be a fruitless attempt.CIt requires further research.DIt lacks creative work.B推理判断题。由第三、四段可知，提取恐龙DNA几乎是不可能的事情，故作者认为克隆恐龙是没有结果的。8What can be a suitable title for the text?AWhy Was Jurassic Park Successful?BReasons for Dinosaurs Dying OutCCan Scientists Clone Dinosaurs?DWays of Cloning DinosaursC标题归纳题。通读全文可知，文章说明了克隆恐龙是不可能的，故标题Can Scientists Clone Dinosaurs？与文章内容吻合。
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