____.explorers could never have found the cave.

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问题 ____.explorers could never have found the cave.

选项 A、But for the fissure had been spotted
B、If not the fissure had been spotted
C、Had the fissure not been spotted
D、Had not the fissure been spotted

答案D

解析考查的知识点是虚拟语气。句意是：要不是认出了山洞的裂缝，探险者们就不可能找到那个山洞。正式文体中，有时可把虚拟条件句中的连词if省去，而将were，had，should等助动词(不包括行为动词)提到主语前面。如果句中没有were，had或should时，既不能省略if，也不能倒装。因此正确答案是D选项。

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____.explorers could never have found the cave.

考博英语

Everyyearthousandsofpeoplearearrestedandtakentocourtforshop-lifting.InBritainalone,aboutHK$3,000,000’swortho

Futuristshaveidentifiedtwochangesthatseemtobecentraltocontemporarysociallife.First,theUnitedStatesisbeingres

(51)Beingangryincreasestheriskofinjury,especiallyamongmen,newresearchsays.Theresearchersgathereddataonmor

ProfessorSmithandProfessorBrownwill_____inpresentingtheseriesoflecturesonAmericanliterature.

Sheboughtahousenearthesealastyearsoshecouldtakea____alongthebeachwhenevershewantedto.

Thismorningwhenshewaswalkinginthestreet,ablackcar____besideher.

Thiswatchis____toalltheotherwatchesonthemarket.

Customerexperienceistheinternalandsubjectiveresponsecustomershavetoanydirectorindirectcontactwithacompany.71

Directadvertingincludesallformsofsalesappeals,mailed,delivered,orexhibiteddirectlytotheprospectivebuyerofanad

Haveyoueverfeltyourlifegointoslowmotionasyourealizesomethingbadishappening?Youmighthavejustknockedoveraw

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在识别社会因素过程中，属于影响人类生活和行为的因素有()。

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