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
Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still exists.【C1】______
Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still exists.【C1】______
admin
2019-05-15
54
问题
Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still exists.【C1】______telescopes first zoomed【C2】______Mars in the 17th century, people have conjured up a wild【C3】______of images or what Martians might look like. But space probes like the 1997 Sojourner land rover have yielded no evidence of such alien beings.
Most experts agree that if life did at one time evolve on Mars, finding evidence of that life— which would likely take the form of tiny organisms—won’ t be easy.【C4】______, many scientists are optimistic. " We’ ve got organisms on Earth that adapted to life deep【C5】______the surface in underground water wells, "says Stephen Clifford.【C6】______life like that evolved on Mars four billion years ago, there’ s no reason why it【C7】______today. "
【C8】______last year’ s disappointing losses, the future of Martian exploration looks【C9】______This year, two major films about fictitious Mars missions—Red Planet and Missions to Mars—are certain to heighten interest in our planetary neighbour. More important, plans for new sets of NASA orbiters and landers—one to launch in 2001 , the other in 2003—are already in the works. Without a doubt, each new mission will inch scientists closer to【C10】______the mysteries of planet Mars.
【C1】
选项
A、When
B、Before
C、Ever since
D、Ever
答案
C
解析
本题考查连词用法。when“当……之时”。before“在……之前”。ever since 表示“自从……时候开始”,引导的从句用完成时态。ever是副词,表示“永远,曾经”,不是连词。根据句子结构和句意,本题选C。
转载请注明原文地址:https://kaotiyun.com/show/Tg3O777K
0
成人本科学位英语
相关试题推荐
Itwasnotuntiltheaccidenthappened______.
In2012,IhadjustrecoveredfromaseriousillnesswhenIreceivedaninvitationtoawriter’sconferenceinOrlando,FloridA
In2012,IhadjustrecoveredfromaseriousillnesswhenIreceivedaninvitationtoawriter’sconferenceinOrlando,FloridA
In2012,IhadjustrecoveredfromaseriousillnesswhenIreceivedaninvitationtoawriter’sconferenceinOrlando,FloridA
Whatareyougoingtodoifyouareinaburninghouse?Howwillyouescape?Doyouknowhowtosaveyourself?Pleasereadthef
—Sir,______?—Yes,sir.Youranthroughthestopsign.MayIseeyourdriverlicense,please?
His______oftheaeroplanewascorrectineverydetailandcouldreallyfly.
Shortlyaftertheaccident,two______policemencametothespot.
______iswellknowntoall,Chinawillbeanadvancedandpowerfulcountryinthenearfuture.
随机试题
属于细胞周期时相特异药物的化疗药是()
同种异体器官移植中效果最好的是
儿童糖尿病病人注射胰岛素过量时突出的表现为
肺胀宜用真武汤合五苓散治疗的证候是()肺胀宜用平喘固本汤治疗的证候是()
5月4日,有媒体曝光了山东潍坊峡山区超量使用剧毒农药“神农丹”种植生姜一事,引发市民关注。对此你怎么看?
2013年,我国国内生产总值568845亿元,比上年实际增长7.7%。其中,第一产业增加值56957亿元,第二产业增加值249684亿元,第三产业增加值262204亿元。第一产业增加值占国内生产总值的比重为10.0%,第二产业增加值比重为43.
Generallyspeaking,aBritishiswidelyregardedasaquiet,shyandconservativepersonwhois【C1】______onlyamongthosewithw
宏操作SetValue可以设置
Doyoulikecomics?Inthe1950sand1960s,manyteenagersusedtoreadcomicslikeBatman,SupermanorXMen.Someweresofasci
Toeffectivelyusethiswashingmachine,youmustcompletefourstepscarefully:loading(装载)theclothes,pouringinthedeterge
最新回复
(
0
)