首页
登录
职称英语
Many people feel that human beings should be responsible forthe disappearan
Many people feel that human beings should be responsible forthe disappearan
游客
2024-12-03
8
管理
问题
Many people feel that human beings should be responsible for
the disappearance of some other animal species. It is true we may【M1】______
have hastened the disappearance of some species, but abundant
evidence suggests that mankind has actually had few impact Biologists【M2】______
point out that 50 species can be expected to disappear in the 20th
century but also remind us that about 50 species became extinct in the
19th century, and 50 species in each of the centuries after that Dr. T. H.【M3】______
Jukes at the University of California has pointed out that about 100
million animal species have become extinct since life began on the
earth about 3 billion years before. Thus, animals come and animals【M4】______
go as a consequence of natural selection as Mr. Darwin had invented.【M5】______
The human race is a recent newcomer to the scene, so we’ve had
nothing whatsoever to do with the disappearance of millions of species.
In fact, when it comes right down it, we’re a miserable failure【M6】______
at genocide. In spite of an all-out centuries-old war against rats, but【M7】______
we haven’t made a dent in its numbers, much less extinguished a【M8】______
single species. And in spite of all our high technology we have not
been successful on eliminating a single undesirable insect species!【M9】______
I’ve come to the conclusion that the people who are trying to
save world are probably quite sincere about it, therefore they don’t know【M10】______
much about science and certainly nothing about systems engineering. [br] 【M4】
选项
答案
before→ago
解析
词汇错误。before和ago都表示“以前”,但before主要用于过去完成时,ago主要用于一般过去时。since引导的从句用的是一般过去时(began),所以要把before替换成ago。
转载请注明原文地址:https://tihaiku.com/zcyy/3872104.html
相关试题推荐
Thereareagreatmanypeoplewhohaveallthematerialconditionsofhappin
Neighborsarethepeoplewholivenearus.Inyouropinion,whatarethequa
SimonFanshawepresentsdifferentpeople’sopinionsonBritishmannersbecause__
SimonFanshawepresentsdifferentpeople’sopinionsonBritishmannersbecause__
SimonFanshawepresentsdifferentpeople’sopinionsonBritishmannersbecause__
Thestudyofphilosophiesshouldmakeourownideasflexible.Weareallofus
Thestudyofphilosophiesshouldmakeourownideasflexible.Weareallofus
Thestudyofphilosophiesshouldmakeourownideasflexible.Weareallofus
AbreakthroughintheprovisionofenergyfromthesunfortheEuropeanEcono
AbreakthroughintheprovisionofenergyfromthesunfortheEuropeanEcono
随机试题
Ifeveryouarecalled【C1】______tointroduceaspeaker;itwouldbewellfor
InHollywood,everybodywantstoberich,famousandbeautiful.Nobodywants
Languageis,andshouldbe,alivingthing,constantlyenrichedwithnewwor
下列说法不正确的是()。A.由于人具有意识,因而人不仅能够认识事物、评价事物、
电流互感器二次侧负荷主要包括()。A.仪器仪表的阻抗 B.连接电缆的阻抗
断路器全面巡视应抄录(____)运行数据。断路器油位$;$SF6气体压力$;$液
M公司从N公司租人数控机床一台。合同约定租期5年,M公司租期每年年末支付给N公司
建筑物重建价格就是()。A:构建价格B:重建成本C:重置价格D:市场价格
A.颊、腭侧局部浸润 B.颊侧近中局部浸润加上颌结节麻醉,腭侧行腭大孔麻醉
下列关于分部报告的表述,不正确的有( )。A.企业应当以报告分部为基础确定经营分
最新回复
(
0
)