You______all those calculations! We have a computer to do this sort of things.

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问题 You______all those calculations! We have a computer to do this sort of things.

选项 A、needn’t have done
B、can’t have done
C、mustn’t have done
D、couldn’t have done

答案A

解析本句的意思是：你没必要做所有那些计算!我们有一台计算机可以做这些事。needn’t have done表示“本不必做”，事实上已经做过了；must have done是对过去事实的肯定猜测，mustn’t表示“禁止，千万别”；couldn’t havedone是对过去情况的可能性的否定猜测，表示“不可能会，可能没有”。根据句意可知应选A。

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英语

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You______all those calculations! We have a computer to do this sort of things.

英语

成考专升本

Theideaofafishbeingabletogenerateelectricitystrongenoughtolightlampbulbs--oreventorunasmallelectricmotor--

Theagriculturalrevolutioninthenineteenthcenturyinvolvedtwothingstheinventionoflabor-savingmachineryandthedevelo

Shedecidedtogiveherself______thepolice.

Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewerebroughtupinthesameway

MichaelmighthavecometoschoolintimeforProfessorBrowning’slecture______.

Tabletopmagicrequiresnosecretformula.Eventhesimplestmealwillbereceivedwithenthusiasmifthetableaccessoriesare

Lawntennisisagoodsport,beingbasedontheancientgameofcourttennis,whichprobablycameupinEgyptorPersiasome250

Ifwehadtorelyononlyfivesensesforsurvival,wewouldbeinverysadshapeindeed.Wewouldn’tknowupfromdown.Wewoul

Sometimeschildrenarekidnapped.Kidnappingislikestealingachild.Itisimportantthatkidnappedchildrenarefoundandbro

CouplesarerestrictingthesizeoftheirfamiliesintheUKbecauseofcashworriesbroughtonbythefinancialcrisisandthe

按照Glasgow昏迷分级计分法，重型颅脑损伤为（）

A．凸透镜B．凹透镜C．环曲面镜D．角膜接触镜E．双光镜

王老师正在上课，学生小华站起来指出了王老师板书上的一个错误，引起学生的窃窃私语。这时王老师的正确做法应该是()。

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资本主义商业利润的实质是()。

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