A million years have been added to man s evolutionary history. While anthropologists once estimated the age of Zin janthropus, the earliest toolmaking creature, as more than 600000 years, a recent radioactive dating measurement, based on volcanic rock samples from East Africa, where Zinjanthropus was discovered in 1959, now indicates that this primitive man may have roamed the earth 1750000 years ago. The new date pushes evidence for the emergence of toolmaking one of the two essential attributes of humanity back into the Pliocene Age, and it seems to fit more easil into the picture of human evolution than the 600000 year figure The Zin janthropus was capable of walking erect, so that its hands were freed, and it had abrain large enough to enable it to perform such simple tasks as making primitive cutting tools from anthropolgists see in the creature a type that could be very close to, if not actual ly in, the line of human evolution. The Zinjanthropus must be classified as a man, albeit(s)of a primitive type, because no animal species other than man both makes and uses tools. Anthropologists consider it probable that the larger brain and higher intelligence of modem an evolved as primitive manlike creatures learned to use tools and to communicate by speech the other essential of humanity Such a course of evolution seems more reasonable starting nearly two million years ago than it would at the faster evolutionary pace required if the process starte only a half million years ago. 59. A million years are added to man s past by the A. unearthing(出土) of Zinjanthropus B. discovery of some primitive tools C. dating of rock samples from East Africa D, invention of a radioactive dating process 0. This leads anthropologists to believe that A. the pattern of human evolution was not what has been generally supposed B. the evolutionary pace was faster than was suppose C. primitive intelligence must be reevaluated D. previous theories of human evolution are correct 61. The Zinjanthropus can be called a man because A. it made and used tools B. it walked erect C. its brain cted its toolmaking D. it probably communicated by speech 62. The new date fits the human evolutionary pattern more easily than the old because it A. allows a more reasonable evolutionary pace B. indicates man is younger than was believed C. establishes the existence of man in the pliocene Age D. indicates that man is nearly two million years old Passage 4A million years have been added to man's evolutionary history.While anthropologists once estimated the age of Zinjanthropus,the earliest toolmaking creature,as more than 600000 years,a recent radioactive dating measurement,based on volcanic rock samples from East Africa,where Zinjanthropus was discovered in 1959,now indicates that this primitive man may have roamed the earth 1750000 years ago.The new date pushes evidence for the emergence of toolmaking one of the two essential attributes of humanity back into the Pliocene Age,and it seems to fit more easily into the picture of human evolution than the 600000 year figure. The Zinjanthropus was capable of walking erect,so that its hands were freed,and it had a brain large enough to enable it to perform such simple tasks as making primitive cutting tools from quartz rock.The Zinjanthropus was not a man of the modern species,homo sapiens,but many anthropolgists see in the creature a type that could be very close to,if not actually in,the line of human evolution.The Zinjanthropus must be classified as a man,albeit(尽管)of a primitive type,because no animal species other than man both makes and uses tools. Anthropologists consider it probable that the larger brain and higher intelligence of modern man evolved as primitive manlike creatures learned to use tools and to communicate by speech the other essential of humanity.Such a course of evolution seems more reasonable starting nearly two million years ago than it would at the faster evolutionary pace required if the process started only a half million years ago. 59. A million years are added to man's past by the _____ . A．unearthing(出土)of Zinjanthropus B．discovery of some primitive tools C．dating of rock samples from East Africa D．invention of a radioactive dating process 60. This leads anthropologists to believe that _____ . A．the pattern of human evolution was not what has been generally supposed B．the evolutionary pace was faster than was supposed C．primitive intelligence must be reevaluated D．previous theories of human evolution are correct 61. The Zinjanthropus can be called a man because _____ . A.it made and used tools B.it walked erect C.its brain directed its toolmaking D.it probably communicated by speech 62. The new date fits the human evolutionary pattern more easily than the old because it _____ . A．allows a more reasonable evolutionary pace B．indicates man is younger than was believed C．establishes the existence of man in the Pliocene Age D．indicates that man is nearly two million years old Passage 4