2020届高考英语考前拔高每日练第3练

1、2020届高考英语考前拔高每日练综合训练（3）1、We went through a period communications were very difficult in the ruralareas.A. whichB. whoseC. in whichD.with which2、Since I have little work experience, I will have to take a series of unpaid internships Icould find my ideal job.A.beforeB.afterC.asD.when3、He asked, "

2、Are you a Party member or a League member?"fHe asked me.A.If I was a Party member or a League memberB.am I a Party member or a League memberC.was I a Party member or a League memberD.whether was I a Party member or a League member4、People have been wondering why elephants do not develop cancer

3、even though they have lifespans（寿命）that are similar to humans, living for around 50 to 70 years.Now scientists believe they know why. A team at the University of Chicago, US has found that elephants carry a large number of genes that stop tumors（肿瘤）developing. To be precise, they found 20 copies of

4、an anti-tumor gene called TP53 in elephants. Most other species, including humans, only carry one copy.According to the research, the extra copies of the gene improved the animal' s sensitivityDNA damage, which lets the cells quickly kill themselves when damaged before they can go on to form dea

5、dly tumors“An increased risk of developing cancer has stood in the way of the evolution of large body sizes in many animals ," the study author Dr. Vincent Lynch told The Guardian. If every living cell has the same chance of becoming cancerous（癌变的）,large creatures with a long lifespan likewhale

6、s and elephants should have a greater risk of developing cancer than humans and mice. But across species, the risk of cancer does not show a connection with body mass.This phenomenon was found by Oxford University scientist Richard Peto in the 1970s andlater named " Peto ' s pOrOdoX( . Biol

7、ogists believe it results from larger animals usingprotection that many smaller animals do not. In the elephant' s case, the making of TP53 isnature ' s way oeping this species alive.The study also found that when the same genes were brought to life in mice, they had thesame cancer resistanc

8、e as elephants. This means researchers could use the discovery to develop new treatments that can help stop cancers spreading or even developing in the first place.“Nature has already figured out how to prevent cancer," said Joshua Schiffman, a biologistat the School of Medicine, University of

9、Utah, US." It ' s up to us to learn how different animalsdeal with the proble m so that we can use those strategies to prevent cancer in people.”I.Why are elephants unlikely to develop cancer?A.They have a rather large body size.B.Their genes suffer no DNA damage.C.Certain genes in their bo

10、dy kill existing tumors.D.They carry many genes to prevent tumors developing.2 .According to the passage, what has been a risk in the evolution of large animals?A.Deadly tumors.B.The huge body mass.C.Cells killing themselves.D.Sensitivity to DNA damage.3 .What does the underlined part“ This phenomen

11、on " in Paragraph 5 probably refer to?A.Larger animals have protection from TP53.B.The risk of cancer is not related to body size.C.Larger animals suffer the same risk of cancer as smaller ones.D.The larger animals are, the bigger risk of cancer they will have.4 .What can be concluded from the

12、passage?A.Depending on nature is surely enough to fight against cancer.B.The TP53 genes have proved useful in stopping cancer in people.D.The extra copies of elephantsC.Humans are expected to prevent cancer with the making of TP53.genes are used to cure cancer patients.5、The bad health effects of sl

13、eep loss during the week can' t be repaid by longer weekendsleep, according to a new study. Researchers have long known that sleep deprivation （录U夺）can cause weight gain and increase other health risks. But for those who force themselves out of bed every weekday after too few hours of shut-eye.

14、They hope turning off the alarm on Saturday and Sunday will repay the weekly sleep debt and remove any ill effects.The research, published in Current Biology , crushes those hopes. Despite complete freedom to sleep during a weekend recovery period,people in a sleep lab who were limited to five hours

15、 of sleep on weekdays gained nearly three pounds over two weeks and experienced disorders that would increase their risk for diabetes over the long term. While weekend recovery sleep had some benefits after a single week of sleep loss,those gains were wiped out when people fell right back into their

16、 same sleep-deprived schedule the next Monday.It s very short lived,“If there are benefits of catchup sleep,they ' re gone when you go back to your daily schedule.said Kenneth Wright, director of the sleep and chronobiology lab at theUniversity of Colorado at boulder.ealth Thesehare long-term. I

17、ts kind of like smokingonce was people would smoke and wouldn ' t see an immediate effect on their health, but people will say now that smoking is not a healthy lifestyle choice. I think sleep is in the early stage of where smoking used to be.Wright said that the study suggests people should put

18、 sleep in the first place - cutting out the“sleep stealers " such as watching television shows or spending time on their phones. Even when people don ' t have a choice about losing sleecauese of child-care responsibilities or job schedules, they should think about getting sleep in the same

19、way they would get a healthy diet or exercise.1.What do the researchers find about weekend recovery sleep?A.It is common among people.B.It will make people healthier.C.It can make people put on weight.D.It s able to make up for the sleep loss.A.Arouses.2.What does the underlined worda crushes "

20、 mean?D. Ruins.B.Guarantees.C.Deepens.3.What will Kenneth Wright agree with?A.It takes long for people to see the effects of sleep loss.B.Smoking and sleep loss have the same bad effects.C.Weekend recovery sleep has many benefits.D.Smoking is more harmful than sleep loss.4.What does Kenneth Wright a

21、dvise people to do?A.Sleep as long as possible during weekdays.B.Watch some TV shows before bedtime.C.Reduce the screen time before sleep.D.Take regular exercise every day.答案以及解析1答案及解析：答案：C解析：考查定语从句：先行词是a period,定语从句中缺少in the period,用in which 或where引导定语从句，句意:我们经历了一个阶段，期间在农村交流很难。选C。2答案及解析：答案：A解析：根据句子

22、的意思可知，应该使用before来引导一个时间状语从句，表示"在之前",after意为"在之后”;as意为"当的时候"when意为"当的时候"均不符合句子的意思.故选:A.3答案及解析：答案：A解析：选择疑问句改为间接引语时，应用whether引导,并用陈述语序.4答案及解析：答案：1.D; 2.A; 3.B; 4.C解析：1.根据文章第二段 A team at the University of Chicago, US has found that elephants carrya large number of gene

23、s that stop tumors（肿瘤）developing. To be precise, they found 20 copies of an anti-tumor gene called TP53 in elephants. Most other species, including humans, only carryone copy.可以判断：大象携带了许多抗癌基因来阻止肿瘤的发展，所以选择D。2 .根据文章第四段第句"An increased risk of developing cancer has stood in the way of theevolution

24、of large body sizes in many animals,联系上文中提到的肿瘤 ，可知选 A。3 .因为划线部分在第五段第一句，而且是承接上文说的，所以往文章第四段最后几句找。从But across species, the risk of cancer does not show a connection with body mass.可以判断：这种现象 指的是物种患癌症的几率和他们的体型没有关系，所以选择Bo4 .A项太过绝对，文中提到的只是自然给予我们战胜癌症的一种可能性，并不是说一定可以。B项文中没有提到，用于做实验的是老鼠，不是人。选才i C说的是未来的一种可能性，正确

25、。D项文中没有提及大象的基因已经被用来治愈癌症病人，所以错误。5答案及解析：答案：1.C 2.D 3.A 4.C解析：1.细节理解题。根据第三段第二句话“Despitecomplete freedom to sleep during a weekend recovery period, people in a sleep lab who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks and e xperienced disorders that would in

26、crease their risk for diabetes over the long term. 可知，平日睡 眠少的人，体重可能会增加，并增加患糖尿病的风险。2 .词义猜测题。本题理解的关键在于搞清楚“thoshopes指代的是第二段中的“thcynope turning off the alarm on Saturday and Sunday will repay the weekly sleep debt and re move any ill effects.”根本句可知人们寄希望于通过周末补觉能弥补睡眠，然后这个研究却打破了 ”人们的这种愿望。推测此处词义为摧毁，打破”的意思。故选D项。3 .细节理解题。根据倒数第二段中的“Theshealth effects are long-term. It ' kind of like smoking once was people would smoke and wouldn ' see an immediate effect on their health, but people will say now that smoking is