卫生类：阅读理解Evidence of Ancient Hunters
Russian and Norwegian scientists have reported finding stone objects and animal bones in the far north of European Russia. The scientists say the objects provide the first evidence that ancient hunters lived in the area more than 30 thousand years ago. They say this is at least 15 thousand years earlier than experts had thought.
The Russian and Norwegian team worked at a camp along the Usa River and the Arctic Circle. The scientists say they found several ancient stone tools. They also found 123 bones from animals such as horses， reindeer（驯鹿）and wolves.
The scientists say their most important discovery was a tusk from an ancient elephant called a mammoth(猛犸). The huge， curved tooth was more than l meter long. The tusk is covered with small cuts. The scientists believe humans made the marks with sharp-edged stone tools.
The scientists used a process known as radiocarbon（放射性碳）dating to measure the age of the tusk. Radiocarbon dating shows the level of a radioactive form of carbon in a substance. The tests showed the tusk is about 36 thousand years old.
The scientists say they are not sure what kind of humans left the stone objects and bones along the river. They said the people were either early humans called Neanderthals(穴居人，尼安德特人) or modern humans. Modern humans spread through Europe and Asia 30 thousand years ago. The scientists say the ancient people needed a high level of social development to survive in the extremely cold environment.
The objects were discovered about 300 kilometers northeast of another area where scientists say humans once lived. That area has objects more closely linked to modern humans. Those objects are believed to be about 28 thousand years old.
Nature magazine also published a report by John Gowlett of the University of Liverpool in England. He said the discovery shows the ability of early humans to do the unexpected. He also said the discovery should renew debate about the effects of the climate on the movements of early human population.
31.Before people found stone objects and animal bones in the north of European Russia， some experts thought human beings lived in that area about
A.30 thousand years ago
B.20 thousand years ago
C.28 thousand years ago
D.15 thousand years ago
正确答案：D
解析：问题问的是：在European Russia北部地区发现石头物品和动物骨头前，一些专家认为人类大概多少年前在此地区生活？根据第一段二三句话，这个发现证明古时的猎人在此地区生活大概是在3万多年前，这比专家认为的至少早1.5万年。
32.The following statements are true concerning the significance of the finding EXCEPT that
A.it brings forwards the time in which ancient hunters lived in that area
B.it provides the evidence of a high level of ancient human society
C.it showed the unexpected ability of the early humans
D.it indicates the effect of climate on the movement of early human population
正确答案：B
解析：问题问的是：以下哪个不是这个发现的重要意义？根据第一段及31题答案可知选项A是这个发现的重要意义，根据最后一段可知选项C和D也是这个发现的重要意义。
33.Which is the most important discovery among the findings
A.A long elephant tusk.
B.Ancient stone tools.
C.123 bones from animals.
D.mammoth tusk covered with small cuts
正确答案：D
解析：问题问的是：以下哪个是这些发现中最重要的一个？根据第三段第一句their most important discovery was a tusk from an ancient elephant called a mammoth(猛犸)，及第三句The tusk is covered with small cuts.可知选项D正确，即带有小的划痕的猛犸象牙。
34.How old is the tusk? About years old
A.25 thousand
B.28 thousand
C.36 thousand
D.40 thousand
正确答案：C
解析：问题问的是：这个象牙有多少年的历史？根据第四段最后一句可知这个象牙有3万6千年历史。
35.What did the ancient people need to survive in the extremely cold environment
A.the ability to do the unexpected
B.a high level of social development
C.thick clothes
D.small animals to feed on
正确答案：B
解析：问题问的是：古代人需要什么才能在这样寒冷的环境下生存下来？根据第五段最后一句话，可知需要高等程度的社会发展，所以B是正确的选项。