The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.

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问题 The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.

选项 A、had they been done
B、they had been done
C、having been done
D、they were done

答案A

解析虚拟语气题。这是虚拟语气的句子，条件句使用了省略if的倒装句形式，动作与过去事实相反。

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专业英语四级

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The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.

专业英语四级

AccordingtoMartin,livinginthe19thcenturywouldhavebeenaverynicethingEXCEPT_______.

BecauseIrelandisanislandgeographicallynearthemainlandoftheUnitedKingdom,EnglishrulershavefoughtsincetheMiddle

Onceitwaspossibleto【C1】______maleandfemaleroleseasilybythe【C2】______oflabour.Menworkedoutsidethehomeandearn

UntilItookDrOffutt’sclassinDeMathaHighschool,Iwasanunderachievingstudent,butIleftthatclass【B1】nevertounde

Inspiteofthetreatment,thepaininhisleggrewin______.

Whatkindofweatherwillitbewhendistantobjectssuch~ashillsandtalltreesseemtobeveryclearandnear?

AreviewofthetreatmentoffemalecharactersinChinesefictionrevealsthatChinesesocialattitudeshaveundergonedramatic

Whydoadultsbelievethatalcoholicawarenessprogramsteachyoungpeoplenottoover-drink?Recently,readinganarticleabout

Comparisonandcontrastareoftenused______inadvertisements.

Doctorssometimes______oldcureswhenmodernmedicinedoesn’twork.

男性，55岁，反复咳嗽15年，间断咯血。病重期间用过青霉素、链霉素和INH治疗，逐年消瘦。胸片：右上肺多个空洞，其周围有较多条索阴影，右肺门上提，气管右移。下一步治疗措施

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