湖南省株洲四中高中英语 Unit2 The universal language Period Two练习题 牛津译林版选修8(1).doc

湖南省株洲四中2014高中英语 unit2 the universal language period two练习题 牛津译林版选修8基础落实.翻译句子1.is he coming back today?i guess so./i hope not._2.they did nothing but sit there.3.all we can do now is wait._4.he gave the same answer before._5.ill lend you one if necessary._.单项填空1.the school rules state that no child shall be allowed out of the school during the day,unless _ by an adult.a.accompanied b.being accompaniedc.to be accompanied d.is accompanied2.a bicycle _by electric power,which does good to the environment,becomes quite popular in our city.a.driven b.being drivenc.to be driven d.is driven3.in cold weather,they cant choose but_and sleep.a.lie down b.to lie downc.lying down d.lay down4.when_what his name was,he made no answer.a.asking b.askedc.ask d.to be asked5.have you found the key to the door?i wish i_.a.have b.doc.did d.had6._you come earlier,you could have met him.a.should b.wouldc.could d.had7.ill be away on a business trip.would you mind looking after my cat?not at all,_ _.a.i have no time b.id rather notc.id like it d.id be happy to8.you ought to have made an apology to tom yesterday evening.yes,i know i _.a.ought to have b.have toc.should d.must have9.he is rather difficult to make friends with,but his friendship,_,is more true than any other.a.once gained b.when to gainc.after gaining d.while gaining10.although she believed that she had a good chance of recovering,the doctor said that few,_,could come back to normal after getting this disease.a.if any b.if soc.if not d.if ever11.will you waste your time and money on that?certainly_！a.i not b.dontc.not d.no12.will you go home tomorrow morning?no,i am going to a lecture,or at least,i am planning_.a.on b.toc.so d.it13.are you a teacher?no,but i_.a.used to b.was used toc.used to be d.used to do14.i listen to english every day over the radio._interesting.a.sounds b.soundingc.it is sounded d.sound15.whats tom doing in his bedroom?_ his sports shoes.a.he looks for b.he looking forc.to look for d.looking for能力提升任务型读写have you ever wondered why there are so many skin colors in the world？do you know why people living in particular areas usually have a certain color？biology and history are the two reasons for this.skin contains something called melanin,which determines a persons skin color.the more melanin a person has,the darker his or her skin will be.the amount of and the production of melanin are controlled by genetics,but can be affected by other things,such as sunlight.if a person lives in a place with less sunlight,a persons body will produce less melanin,making the skin lighter.skin color is also affected by another sourcevitamin d.humans all need vitamin d to build bones.people can get it by eating foods such as fish and milk,or from sunlight,so sunlight absorbed by melanin cannot be used for vitamin d production.therefore,a darkskinned person will produce less vitamin d than a lightskinned person when they received the same amount of sunlight.the connection between vitamin d production and skin color is clear when we look at evolution.the earliest humans lived in africa,and their dark skin covered with hair.when they moved to places that had less sunlight,their bodies produced less vitamin d because of their dark skin.as a result,their skin made less melanin,so they could get enough sunlight to produce vitamin d.their skin gradually got lighter and they lost hair.now,people living in areas with strong sunlight like africa,have darker skin,while people living in other areas have lighter skin.the exception to this is the inuit,who live in a place with little sunlight,but have dark skin because they eat a lot of fish and have enough vitamin d.evolution has given us a rainbow of skin colors.humans have always had melanin to determine our skin color.what has changed through history is the environment where we have lived.this has in turn changed our melanin production,and eventually,skin color.brief 1._people living in a particular 2._ usually have the same skin color and there are many different skin colors in the world.reasons for skin colorthe reasons for different skin colors mainly 3._ in biology and history.biologyreasonsthe amount of melanin,by which a persons skin color is 4._,varies from people to people.the more melanin a person has,the 5._ his or her skin will be.vitamin d is another source 6._ skin color.vitamin d is necessary for humans to build bones.sunlight contributes to vitamin d in the skin.historyreasonsthe earliest people in africa had dark skin with hair covering it because the sunlight is very strong.when they moved to places where they could not get enough sunlight to 7._ vitamin d,their skin color became lighter.generally speaking,people in areas with strong sunlight,have darker skin 8._ people in other areas have lighter skin.9._melanin 10._ an important role in our skin color.with our living environment changing,melanin production is changed,which leads to the changes in our skin color. 答案基础落实.1.他今天回来吗？我猜他回来。/我希望他不回来。2.他们什么都没做,只是在那儿坐着。3.现在我们能做的只是等待。4.他给了和以前一样的答案。5.如果有必要我借给你一个。.1.a2.a3.b4.b5.d6.d7.d8.a9.a10.a11.c12.b13.c14.a15.d能力提升1.duce8.while9.conclusion10.plays答案基础落实.1.他今天回来吗？我猜他回来。/我希望他不回来。2.他们什么都没做，只是在那儿坐着。3.现在我们能做的只是等待。4.他给了和以前一样的答案。5.如