Unit3 Reading课后练习Ⅰ.单词拼写1．In this box are some stem ________(细胞) that are urgently needed by a patient.2．I’d like to make an appointment with the d________ to have my bad teeth pulled out.3．You cannot legally take possession of the property until the c________ is signed.4．All the findings had proved that the ________(病毒) was not directly linked to the bats.5．The girl ________(删除) some important information by mistake the other day.6．There is a heated d________ over whether humans’ lifespan is determined by genes.7．It is universally acknowledged that it is illegal to ________(限制) people’s freedom.8．He spends too much time on maths，and this，without doubt，________(影响) the progress of his other subjects.Ⅱ.单句语法填空1．The chemist is very strict with himself and will always put everything in the lab ____ place.2．We can say，________ doubt，that such diseases as cancer will be cured one day.3．________ no means will we sign contracts with companies which are dishonest.4．Almost all companies in that building prohibit________(sleep) on the job，even during breaks.5．At break，Mr.Green got down to dealing with the matters ________(arise) from his company.6．The doctor said that their baby was ________(normal)，which made the couple very worried.7．The ________(resist) to vaccine(疫苗) has continued for decades，and it is driven by a real but very small risk.8．Whether the community’s work contributes much to an overall accumulation of knowledge is ________(doubt)．9．In many cases，the clothes people wear identify them ____ belonging to a particular social class.10．Hurrying to send my 11-year-old daughter to school，I made a right turn at a red light where it ________(prohibit)．11．He can’t resist________(eat) fried food even though he knows it is harmful to his health.12．We call on the people ________(relate) to the case to handle the tough problem by joint efforts.Ⅲ.单句写作1．尽管他很忙，他还是来车站接我们。
despite the fact that...)________________________________________________________2．吸毒不仅影响一个人的健康，而且影响我们的社会affect)________________________________________________________3．学生们有时通过做兼职工作来养活自己by means of)________________________________________________________4．出于安全考虑，我们必须禁止游客在公园里投喂动物prohibit)________________________________________________________ 5．孩子们每次看电视的时间应限制在30分钟以内restrict) ________________________________________________________Ⅳ.阅读理解Do you want to live another 100 years or more？Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.“I think we are knocking at the door of immortality(永生)，” said Michael Zey，a Montclair State University business professor and author of two books on the future.“I think by 2075 we will see it and that’s a conservative estimate(保守的估计)．”At the conference in San Francisco，Donald Louria，a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnology(纳米技术) make it likely that humans will live in the future beyond what was possible in the past.“There is a great effort so that people can live from 120 to 180 years，” he said.“Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years.”However，many scientists who specialize in aging are doubtful about it and say the human body is just not designed to last about 120 years.Even with healthier lifestyles and less disease，they say failure of the brain and organs will finally lead all humans to death.Scientists also differ on what kind of life the super aged might live.“It remains to be seen if you pass 120，you know；could you be healthy enough to have good quality of life？” said Leonard Poon，director of the University of Georgia Gerontology Centre.“At present people who could get to that point are not in good health at all.”1．By saying “we are knocking at the door of immortality”，Michael Zey means .A．they have got some ideas about living foreverB．they believe that there is no limit of livingC．they are able to make people live past the present life spanD．they are sure to find the truth about long living2．Donald Louria’s attitude towards long living is that .A．the human body is designed to last past about 120 yearsB．it is possible for humans to live longer in the futureC．it is still doubtful how long humans can liveD．people can live from 120 to 180 years3．The underlined word “it” (in Paragraph 4) refers to “ ”．A．a great effortB．the conservative estimateC．the idea of living from 200 to 300 yearsD．the idea of living beyond the present life span4．What would be the best title for this text?A．No Limit for Human LifeB．Living Longer or NotC．Science，Technology and Long LivingD．Healthy Lifestyle and Long Living参考答案：Unit3 Reading课后练习Ⅰ.单词拼写1．In this box are some stem cells(细胞) that are urgently nee。
