首页
登录
职称英语
Fire, scientists agree, helped give rise to a successful, thriving human pop
Fire, scientists agree, helped give rise to a successful, thriving human pop
游客
2023-10-11
26
管理
问题
Fire, scientists agree, helped give rise to a successful, thriving human population by providing heat for cooking and protection from the cold.
But they don’t agree【C1】______when humans began using fire. Some researchers argue that it【C2】______more than a million years ago when early humans【C3】______their way to Europe from Africa, and【C4】______say it happened much later. Now, a new study reveals that humans did not【C5】______fire until about 400 000 years ago.
Two archaeologists(考古学家)in the US report their【C6】______in the current issue of the Proceedings of the National Academy of Sciences. They looked at excavation(发掘)reports and studies from 141 sites in Europe that were【C7】______1.2 million and 35 000 years old. They think there is no clear evidence of【C8】______fire use until about 400 000 years ago. In Africa,【C9】______there are several sites where there was evidence of fire, those may have been【C10】______fires that occurred in the African grassland.【C11】______, there are also sites older than 400 000 years in Europe that indicate the【C12】______of humans, with the oldest, in Spain, more than a million years old. This means that【C13】______Europe’s extreme winter climates, early humans found a way to【C14】______without the warmth of a fire.【C15】______the researchers mention, early humans are【C16】______and persistent(坚持的). But some researchers【C17】______that it is still a puzzling explanation and it still【C18】______some serious thinking about how【C19】______the human being could have survived on a seasonally【C20】______food supply despite having small teeth and small guts. Up to now, no one has solved this problem yet. [br] 【C9】
选项
A、while
B、when
C、since
D、provided
答案
A
解析
上一句指出没有发现用火的证据,本句又提到在非洲发观几处火的痕迹,很显然这是一种转折关系,所以选while引导让步状语从句,意为“虽然,尽管”when引导时间状语从句;since“由于;自……以后”,引导原因或者时间状语从句;provided“假如,倘若”,引导条件状语从句。
转载请注明原文地址:https://tihaiku.com/zcyy/3089068.html
相关试题推荐
Whenwasthelasttimeyoucomeoutofaverysuccessful【M1】______filmand
Whenwasthelasttimeyoucomeoutofaverysuccessful【M1】______filmand
Whenwasthelasttimeyoucomeoutofaverysuccessful【M1】______filmand
Whenwasthelasttimeyoucomeoutofaverysuccessful【M1】______filmand
Whenwasthelasttimeyoucomeoutofaverysuccessful【M1】______filmand
"Successfulcloningofanincreasingnumberofspeciesconfirmsthegeneralimpr
"Successfulcloningofanincreasingnumberofspeciesconfirmsthegeneralimpr
Whatisscientists’aimofdrillingavolcano?[br][originaltext]16.Scientist
Whatisscientists’aimofdrillingavolcano?[br][originaltext]16.Scientist
Whatisscientists’aimofdrillingavolcano?[br][originaltext]16.Scientist
随机试题
[originaltext]W:Whatarethemajorchallengesthatyouhavefacedinyourcare
[originaltext]AneighborhoodbarbershopmightseemtosomeAmericanslikea
Whentheearthwasborntherewasnoocean.Thegraduallycoolingearthwas
[originaltext]ThedaysofthehunterarealmostoverinIndia.Thisispart
[originaltext]W:Iwanttoregisterforthismathematicscourse.M:I’msorry
没有考虑到投入产出关系是企业财务管理()目标的缺点。A.每股收益最大化 B
甘油的作用是A.成膜材料 B.脱膜剂 C.增塑剂 D.着色剂 E.遮光剂
根据《中华人民共和国会计法》,不应该进行会计核算的事项是()。A.款项和有价证
下列关于股份有限公司召开董事会临时会议说法中,正确的是()。A.1/3以上监事提
验收资料的制备由项目法人统一组织,验收资料应具有()。A.真实性、完整性、历史
最新回复
(
0
)