Unit 8 Adventure.doc

Unit 8 Adventure一、单项填空1With so much water being used in the bathroom，it is no_ that more environmentally friendly technologies have come out to make better use of water resources.Asurprise Bneed Cquestion Ddoubt2She always differs_ me_ how to spend the vacation. Aon；with Bwith；on Cat；with Dfrom；in3Rose lost her job again.Dont worry.There is _ work for girls of her age.Atoo much Ba number of Cplenty of Dquantity of4If your race car isnt insured，you may_ losing everything when it hits something solid.Adelay Bdeny Cavoid Drisk5The parents will be _ unless they know that their children are safe and sound.Aeager Bnervous Canxious Dconscious6Havent you been thankful for the preparations she_ for the party？Ahad Bmade Cdid Dpaid7They_ the train until it disappeared in the distance.Asaw Bwatched Cnoticed Dobserved8The charges_ from 5 yuan to 10 yuan.Achange Bvary Cdiffer Drank9Is there any_ to the time that I can stay here?Yes，you must leave here before he comes back.Anumber Blength Climit Dmatter10Are you free after school?Sorry，Ive planned to treat a friend of mine to dinner_ for his help.Ain order Bin return Cin turn Din honour11You need a break.Why not take a week _ from work？ Aoff Baway Cup Dalong12None of us expected the chairman to_ at the party.We thought he was still in hospital.Aturn in Bturn over Cturn up Dturn down13Its important for advertisers to_ their message_ customers.Aget；across to Bmake；knownCget；down Dmake；knowing to14East of our school_ two companies_ make electric motorbikes.Aare；that Bis；whereCis；that Dare；where15I saw Jack _ by the police.Ataken away Btake awayCbeing taken away Dboth A and C二、阅读理解 It might seem hard to imagine that a bad tooth could be deadly.But doctors in the Washington area say a twelveyearold boy died last month of a tooth infection that spread to his brain.They say it might have been prevented if the boy had received the dental care he needed. Experts at the National Institutes of Health say good dental care should start at birth.They say breast milk is the best food for the healthy development of teeth.Breast milk can help slow bacterial growth and acid production in the mouth. When babys teeth begin to appear，you can clean them with a wet toothbrush.Dentists say it is important to find soft toothbrushes made especially for babies，and use them very gently. The use of fluoride(氟化物) to protect teeth is common in many parts of the world.This natural element is often added to drinking water supplies.The fluoride mixes with enamel(釉质)，the hard surface on teeth，to help prevent holes，or cavities from forming. But the American Academy of Pediatric Dentistry points out that young children often swallow toothpaste when they brush their teeth.The group notes that swallowing fluoridated toothpaste can cause problems.So young children should be carefully supervised when they brush their teeth.And only a small amount of fluoridated toothpaste，the size of a green pea，should be used. Parents often wonder what effects sucking a thumb or sucking on a pacifier might have on their babys teeth.Dental experts generally agree that this is fine early in life. The American Academy of Family Physicians says most kids stop sucking their thumbs by the age of four.If it continues，the group advises parents to talk to their childs dentist or doctor.It could influence the correct development of permanent teeth.语篇定位本文是一篇新闻报道。人们很难想象牙病会致命，但是华盛顿地区的医生们说，上个月一个12岁的男孩死于蔓延到大脑的牙病感染。文章强调了保护牙齿的重要性。长难句分析But doctors in the Washington area say a twelveyearold boy died last month of a tooth infection that spread to his brain.该句中的that引导一个定语从句，其中spread to意为“传播到，蔓延到”。句意为：但是华盛顿地区的医生们说，上个月一个12岁的男孩死于蔓延到大脑的牙病感染。16The boy with a bad tooth died because _.Ahis tooth disease was very deadlyBthe doctor refused to treat him properlyChe didnt receive timely treatmentDsomething was wrong with his brain17All the following statements are good to teeth except that _.Achildren live on breast milk every dayBchildren begin to brush their teeth when they are old enoughCchildren use fluoride toothpaste to brush their teethDchildren form the habit of sucking their thumbs18The underlined word “supervised” in the fifth paragraph means “_”Awatched and directed Btaught and helpedCpraised and advised Dled and pointed out19Which one of the followings is NOT true according to this passage?ADental care should be given to babies as soon as they are born.BSpecial toothbrushes should be used for babies.CBreast milk and fluoride are helpful to protect baby teeth.DDental experts suggest stopping babies sucking their thumbs.20The best title of this passage is “_”AThe reason of a twelveyearold boys deathBBaby teeth should be cared for from birthCBreast milk and fluoride are importantDHow to help young children form good habits三、任务型读写 Attention deficit(不足)hyperactivity(活动过度) disorder is known by the letters AD.H.D.Children with AD.H.D.might have trouble paying attention.They might not seem to listen and might forget things.They might not be able to stay seated or play quietly.They might talk too much，act and speak without thinking about the results of their behavior.These are among the signs named on the website of Americas Centers for Disease Control and Prevention. Doctors usually identify the disorder in children.But experts say the behaviors often last into adulthood.Researchers have been looking for the cause or causes of attention deficit hyperactivity disorder.Now, a brainimaging study offers more evidence that could lead to new ways to treat it.Researchers say they observed shortages in the brains reward system in patients with A.D.H.D.The study found that levels of some proteins were lower than normal.Nora Volkow, director of the National Institute on Drug Abuse, says the lack of attention and selfcontrol that mark A.D.H.D. could be caused by problem in the flow of dopamine(多巴胺). She says people might have difficulty completing an activity if they cannot expect some kind of reward in return. Researchers studied the pathways on which dopamine travels and A.D.H.D. Doctor Volkow says the researchers then compared the pathways to those of 44 adults without the disorder. “There is a lower concentration of dopamine markers in the brain of individuals with AD.H.D., specifically in the areas of the brain that are involved with reward and motivation. And the dopamine levels are directly linked to the severity of the patients inattention，”she says.The study used brain images taken at Brookhaven National Laboratory in New York State. Jack Wang is chairman of the Brookhaven medical department. He says the finding might also help explain why people with AD.H.D.are more likely to abuse drugs or overeat. He says they might be attempting to increase their dopamin