首页
登录
职称英语
Some Martian rock structures look strikingly like structures on Earth that are k
Some Martian rock structures look strikingly like structures on Earth that are k
游客
2024-09-13
29
管理
问题
Some Martian rock structures look strikingly like structures on Earth that are known_____ by microbes.
选项
A、having been created
B、being created
C、to have been created
D、to be created
答案
C
解析
空格所在的定语从句为“sth. be known to do”结构,因此排除A、B项。其次,that指代地球上的岩石结构,与created之间存在被动关系,故要用被动式,C、D都符合。最后,当不定式动作发生在谓语动词的动作之前时,不定式需要用完成式,本题中,在人们已知前,岩石结构已经由微生物创造成,即created动作先于are known发生,所以选择C项to have been created。
转载请注明原文地址:https://tihaiku.com/zcyy/3755965.html
相关试题推荐
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
AmericanFamilies1.Familystructures【T1】______orn
SomeMartianrockstructureslookstrikinglylikestructuresonEarththatarek
随机试题
Themajorityofthepopulationlivesinnoisymassivetowerblocks.Cities
(1)WHYSHOULDanyonebuythelatestvolumeintheever-expandingDictionary
StartupNuclearEnergyCompaniesAugurSafer,CheaperAtomicPowerA)N
[originaltext]Oneoftherequirementsofeverygraduationceremonyspeaker
关于建筑采光的节能措施,错误的是()A.侧面采光采用反光措施 B.顶部采光
遇到易风化的页岩、黏土岩时,应留有()的保护层,待浇筑混凝土前再挖除。A、0.
房地产经纪行业管理是社会公共管理的一个组成部分,因此它的基本作用是( )。A.
个别企业生产商品劳动时间的缩短意味着()。A.商品价值量的减少 B.商品价值
(2017年真题)根据《关于全面推行河长制的意见》,各级河长的职责主要有()。
结核性支气管扩张的好发部位在A.左舌叶支气管 B.右上叶支气管 C.左下叶支
最新回复
(
0
)