完形填空It’sdifficultfordoctorstohelp

完形填空It’s difficult for doctors to help a person with a hurt brain. 1enough blood, the brain can live only three to five minutes. Usually doctors can’t fix the hurt 2such a short time.Dr Robert White thinks he knows a 3of help. He thinks doctors should make the hurt brain 4to live for 30 minutes without blood. This gives the doctor 5time to do something for the brain. Dr White experimented his 6on fifteen monkeys. 7he taught them to do different jobs. Then he operated on them. He made the monkeys’ blood go 8 a machine. When the brains’ 9was 10℃, he stopped the blood to the brain. After 30 minutes, he turned the blood back on. He 10the blood again. After their operations, the monkeys were almost 11before. They were healthy and busy. Each one could still do the job the doctor 12them.Dr White’s idea works well on monkeys. He thinks it will work on 13. He think it will help with heart problems. A person 14die when his heart stops; doctors can 15it again. The problem es: when the brain is without blood for about 5 minutes, it 16. If doctors start the heart again after 5 minutes, the person has 17body but a dead brain. Maybe in the future, doctors will 18Dr White’s idea. When the person’s heart stops the doctor will 19cool the brain. They will have 30 minutes to start the heart again. Maybe there will be no 20the brain.1.A.Don’t haveB.WithoutC.Having notD.Only with2.A.forB.afterC.inD.since3.A.wayB.brainC.doctorD.man4.A.too coolB.enough coolC.cool enoughD.that cool5.A.a longerB.enoughC.a shorterD.another6.A.medicineB.mannersC.ideaD.brain7.A.BesidesB.InsteadC.HoweverD.First8.A.toB.acrossC.throughD.onto9.A.heatB.temperatureC.coolnessD.feeling10.A.cooledB.operatedC.warmedD.stopped11.A.the same asB.different fromC.used toD.cleverer than12.A.was taughtB.was teachingC.was to teachD.had taught13.A.other peopleB.human beingsC.other thingsD.more people14.A.doesn’t have toB.needn’tC.will be able toD.is afraid to15.A.startB.takeC.makeD.begin16.A.losesB.goesC.killsD.dies17.A.noB.a deadC.a livingD.a lively18.A.getB.acceptC.keepD.try19.A.soonB.quicklyC.slowlyD.rapid20.A.use forB.wrong withC.value toD.problem with