首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
If the population of the Earth goes on increasing at its present rate, there will eventually not be enough resources left to【B1】
If the population of the Earth goes on increasing at its present rate, there will eventually not be enough resources left to【B1】
admin
2016-04-03
45
问题
If the population of the Earth goes on increasing at its present rate, there will eventually not be enough resources left to【B1】______ life on the planet. By the middle of the 21st century, if present【B2】______ continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the 【B3】______ conditions on Earth will make it necessary for us to look for open space somewhere else.
An American scientist, Professor Carl Sagan, believes that before the earth’s resources are completely【B4】______, it will be possible to change the atmosphere of Venus and so create a new world almost as large as Earth itself. The difficulty is that Venus is much hotter than the Earth and there is only a tiny amount of water there.
Sagan【B5】______ that algae(藻类), organism that can live in 【B6】______ hot or cold atmospheres and at the same time produce oxygen, should be【B7】______ in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will【B8】______ the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler but before man can set foot on Venus, it will be necessary for the oxygen to produce rain. The【B9】______ of the planet will still be too hot for men to【B10】______ it but the rain will eventually fall and in a few years something like Earth will be reproduced on Venus.
【B5】
选项
答案
proposes
解析
此处需要谓语动词。Sagan为人名,根据全文时态可知这里要用第三人称单数。propose意为“提议”。
转载请注明原文地址:https://kaotiyun.com/show/4IG7777K
0
大学英语六级
相关试题推荐
HIV&AIDS[A]AIDShasnowsurpassedtheBlackDeathonitscoursetobecometheworstpandemicinhumanhistory.Attheendof
A、Gettingrichquickly.B、Distinguishingoneself.C、Respectingindividualrights.D、Doingcredittoone’scommunity.B
A、Mostofthemaresatisfied.B、Mostofthemareveryhappy.C、Mostofthemareunhappy.D、Mostofthemarenotsatisfied.A
A、Thesupermarketisconvenient.B、Thesupermarketishugeandhecanfindeverythingheneeds.C、Thegoodsinthesupermarketa
A、Shewantstoknowwheretherestaurantis.B、She’srecommendingagoodplacetogofordinner.C、Shethinksthemanshouldgo
A、Americanfarmerstravelsfromavillagetohisfieldseachmorning.B、Americanfarmershavemoremoney.C、EachAmericanfarmer
ShouldSingle-SexEducationBeEliminated?[A]Whyisaneuroscientistheredebatingsingle-sexschooling?Honestly,Ihadnofix
A、Gototheoriginplaceofyoga.B、Becomeamasterinthisfield.C、Setupafitnesscenter.D、Teachthewomanmeditation.A
Humansarehavingahardenoughtimecopingwiththenaturalvariabilityinourenvironment,whichcausesdisasterssuchasheat
A、Shehasatemperature.B、Shesuffersfromaheadache.C、Shehasasorethroat.D、Sheoftenfeelsdizzy.C
随机试题
李商隐的无题诗,大多属于()。
下列哪种外治法不适应于痄腮
A.地肤子B.沙苑子C.山荣萸D.豆蔻E.槟榔药材的原植物属豆科的是
投资项目敏感性分析是通过分析来确定评价指标对主要不确定性因素的敏感程度和( )。
在一个单位内具体负责会计工作的中层领导人员是指()。
《巴塞尔资本协议》规定,银行的资本充足率不得低于()。
关于投资性房地产转换日的确定,下列说法中,正确的有()。
法律责任的核心构成要素是()。
1984年10月,中共十二届三中全会通过了《关于经济体制改革的决定》,在社会主义经济理论上的重大突破是
学校的每个社团都有一名团长,且一个同学可同时担任多个社团的团长,则实体团长和实体社团间的联系是
最新回复
(
0
)