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A.when one road is blocked,try anotherB.how bad the lunch of her school isC.how wise her father isD.about the church tower near her homeDHumans really do have a sixth sense that lets us detect magnetic fields()but we're not aware we have it.It has long been known as ESP,Spider Sense,or the ability to see things before they happen.But now scientistshave proved that humans really do have a sixth sense-that lets them detect magnetic fields.Tests have shown thatmankind may have the same inborn sense of Earth's magnetic field that has long been proved to exist in animals.By putting a protein from the human retina (into fruit flies,researchers noticed that the insect adjustedits flight path just as if its eye had not been changed.This suggests that the "sixth sense"does exist in humans butwe might not be aware of it.Animals use such sight to navigate long distances during migration or,in the casc ofbirds,to"see"where they are going.The complex tests involved examining the process by which light goesthrough a bird's eye,which has interested the scientific community for more than 30 years.In the late 1970s,thephysicist Klaus Schulten concluded that birds fly by relying on geomagnctically (sensitive biochemicalreactions in their eyesTests have shown that the special cells in the eye carry out this function using the protein cryptochrome)Professor Reppert's team used wild fruit flies,replacing their version of cryptochrome with the humanequivalent(等价物)，and then put them in a maze(迷宫)with each wing wrapped in a metal coil(金属圈).Theythen sent electricity through it so that the coil was magnetised in a way which is just like Earth's electromagneticfield )The flies responded in exactly the same way as if they had their own cryptochrome,by eitheravoiding the magnetic fields or moving towards them if the researchers had placed sugar nearby.The new study was published in the journal Nature Communications12.What do we know about humans'sixth sense?A.Humans have been aware of it since ancient times.B It is quite different from the animals'.C.It is the ability to predict what will happen.D.It is also a sensc developed after birth.13.Why did researchers put a protein from the human retina into fruit flies?A.To change fruit flies'flight path.