1、Unit 21Human Biology众所周知，疾病总是困扰我们的健康，有些秘诀可以帮助我们保持健康。Four Secrets To Never Getting SickEver wonder why you always seem to come down with a life interrupting virus this time of year，while other women you know sail through the seasons snifflefree，coughfree，and achefree?Follow these simple steps to boos
2、t your virus protection：Make Friends With Fresh AirNot only does escaping into the fresh air give you a break from all those germs circulating inside，but going for a stroll can actually boost your immunity.Relaxation Fights Off ColdsBeing stressed will increase your susceptibility to catching a cold
3、.That may be because，over the long term，it leads to the ongoing release of stress hormones (荷尔蒙)，such as glucocorticoids(粮皮质激素)Clean Hands Are EverythingCold and flu can spread all too easily through touch.Keep your fingers away from your eyes，nose，and mouth as much as possible，and make sure to mast
4、er the art of handwashing.Soap and water remain your most effective tools there.Enough Sleep Is The Magic BulletAn occasional restless night is nothing to worry about，but a continuous lack of sleep can hamper your immune(免疫)systems ability to function.Anything short of seven hours nearly triples you
5、r odds of catching a cold.1boost vt.促进；使增加2stroll n. 漫步；闲逛3susceptibility n. 敏感性；易感性4hamper vt. 妨碍；阻止5triple vt. (使某物)增至三倍1Why do we often wash our hands in order not to catch a cold?_2How can cold and flu spread?_【答案】1.Because cold and flu can spread easily through touch and we often touch somethin
6、g with our hands.2.By touch.Section Warmup & Super AthletesPreparing根据提示写出下列单词1_ vi.循环2_ vi. 用泵抽出(注入)3_ vt. 消化4_ vi. 交换5_ vt. 滥用6_ vt. 容忍7_ adj. 根本的；基础的8_ adj. 怀疑的，不肯定的9_ vt. 寻找10_ adj. 每年的，一年一次的，年度的11_ adj. 站不住脚的，不易令人相信的12_ adj. 强制性的，义务的13_ adj. 有争议的14_ vt. 反对15_ vt. 与(其他事物)相矛盾16_ vt. 违反，违背【答案】1.ci
7、rculate2.pump3.digest4.swap5abuse6.tolerate7.fundamental8.doubtful9seek10.annual11.lamepulsory13controversial14.oppose15.contradict16.violate根据提示补全下列短语1_ vain徒然，白费力气2_ random 随便地；随意地3_ all costs 不管多大代价，无论如何4due _ 由于5come _ 偶然遇见6contribute _ 促成；导致7_ silence 沉默地；默不作声地8more _ less 或多或少，大约9_ of breath 气
8、喘吁吁10_ use (机械、场所等)在使用中【答案】1.in2.at3.at4.to5.across6.to7in8.or9.out10.in根据提示补全下列教材原句1These drugs are originally developed to help people with illnesses，but in the wrong hands，they create supreme athletes _.这些药物被开发原本是用来帮助有疾病的人们，但一旦用于歧途，它们会创造出比常人更快更强的超级运动员。2Taking these drugs _“doping” and although th
9、ey enhance performance.服用这些药物被公认为“服用兴奋剂”，虽然能提高成绩3If American athlete Marion Jones _ drugs，_ she _ to the Olympics at all?如果美国运动员玛里昂琼斯没有服用兴奋剂的话，她能成功参加奥运会吗？4_ but other participants are only tested at random.获胜者要强制性地进行检查，而其他参与者只是随意地检查。5In the future，athletes who _ might be able to do the 100 metres da
10、sh in just 8 seconds or the marathon in less than two hours.在将来，那些经过基因改变的运动员可能在8秒内跑完100米或在不到两小时内跑完马拉松。【答案】1.making them faster and stronger than is normal for human beings2.is known as3.hadnt taken；would；have made it4.It is compulsory for winners to be tested5.have their genes changed阅读P34课文，并从四个选项中
11、选择最佳答案1Some sports predictions were always_.ArightBwrongCsimpleDmature2Whats the drugs legal effect?ATo make the athletes run faster.BTo make the audience cheer more excitedly.CTo cure the patients.DTo make money for the chemists.3Ben Johnson_.Aused to be the 100 metres world record holderBwas taken
12、 as a drugtakerCwill be the 100 metres world record holderDwill be taken as a drugtaker4Which is right according to the passage?ASome athletes want to achieve the championship with the help of doping.BIt is easy to clarify whether an athlete has taken drugs.CDoping is the only problem in track and f
13、ield.DGenetherapy will benefit the athletes.5In the future，_.Aathletes must have their genes changedBathletes will finish 100 metres in only 8 secondsCathletes will finish the marathon in less than two hoursDthe Olympic spirit will go on【答案】15BCBAD阅读P34课文，在空白处填入适当的内容(1个单词)或括号内单词的正确形式Years ago when w
14、e talked about “cheating”，an exam would occur to our mind.1._，cheating is now used not only in exams 2._ also in sports or games.When 3._ (refer)to“cheating”in the games，we come across the issue of performanceenhancing drugs.The drugs are 4._ (origin) developed to help people with illnesses，but now
15、they also create supreme athletes 5._ (make)them faster and stronger than is normal for human beings.Taking these drugs is known as“doping”，6._ can cause serious health problems in later life for those who abuse them，but some athletes seek to achieve beyond their natural limits and are prepared to c
16、heat to do so.The sports world doesnt tolerate doping as it is a fundamental form of cheating.To our surprise，some athletes，7._ (include)some worldrecord keepers or breakers violated the rule.Such as Ben Johnson in 100 metres in the 1988 Olympics.Floyd Landis in the annual cycling race in 2006 8._ A
17、merican athlete Marion Jones in the Olympics.9_ (fortunate)，it is not easy to catch athlete using illegal drugs because it is compulsory for winners to 10._ (test)，but others only at random.However，doping is not the only thing we need to worry about.“Genetherapy”will be the next big threat.If genetherapy were used now，it would be almost impossible to find out.【答案】1.However2.but3.referring4.originally5.making6.which7.including8.and9.Unfortunately10.be tested