Generally, snakes won’ t attack humans______they are threatened with danger.

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问题 Generally, snakes won’ t attack humans______they are threatened with danger.

选项 A、if
B、since
C、unless
D、while

答案C

解析考查连词辨析。句意：总体来说，蛇是不会攻击人类的，除非它们受到了危险的威胁。unless意为“除非，如果不”，相当于if not，引导条件状语从句，与句意和句法结构相符，故答案为C。if引导条件状语从句，与unless意思相反；since引导时间状语从句或原因状语从句；while引导时间状语从句，这三项均不符合句意和句子逻辑，故排除。

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成人本科学位英语

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Generally, snakes won’ t attack humans______they are threatened with danger.

成人本科学位英语

I______onseeingthemanager.Theserviceinthishotelisterrible.

Afriendlyrelationshipbetweentwocountriesisoftenbasedon________respect,trustandunderstanding.

ItisgenerallyagreedthattheInternethasbroughtpeopletogether______.

A:Youlookunhappy.【D1】______B:Oh,justbecauseofmyparents.Theyarealwaysarguing.A:Forwhat?B:Myweekendactivity.【

DeathValleyisoneofthemostfamousdesertsintheUnitedStates,coveringawideareawithitsalkalisand.Almost20percen

A:Excuseme,canyoutellmewherethenearestrestaurantis?B:Oh,therestaurant?ThenearestoneistheCityRestaurant.It

Everydirectorneedsanassistantthathecan______totakecareofproblemsthatmayoccurinhisabsence.

Atthebeginningoflastcentury,medicalscientistsmadeaninterestingdiscovery:wearebuiltnotjustoffleshandbloodbut

Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwardJamesLennoxanddeclaredopenonSept.18,1899.

In1866,sailorsonaGermanshipcalledPaulathrewabottlewithamessageintowatershundredsofmilesoffthewesterncoast

调节肾上腺髓质激素分泌的因素有

下列哪项出现非凹陷性水肿

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会计中期包括( )。

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