How many more decades will have to pass______ scientists succeed in providing a cure for cancer?

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问题 How many more decades will have to pass______ scientists succeed in providing a cure for cancer?

选项 A、when
B、since
C、before
D、until

答案C

解析 before常可用于将来时态，表示“才；就”，如：It will be several weeksbefore you are used to the new life in college．几个星期后你就会适应大学里的新生活了。 A．when一般不与将来时态连用；B．since常与现在完成时连用；D.until直到，用在此处意义不符。

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本试题收录于：英语题库普高专升本分类

英语

普高专升本

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How many more decades will have to pass______ scientists succeed in providing a cure for cancer?

英语

普高专升本

ReligiousandprivateschoolsreceivelittlesupportfrompublictaxesintheUnitedStates,and【C1】______aresult,areusually

Shedidn’tbreakthebadnewstohermother______thatshemightbreakdown.

Television,itisoftensaid,keepsone【C1】aboutcurrentevents,allowsonetofollowthe【C2】developmentinscience

Obviouslyitismeaninglessinincreasingyourw.p.m.rateifyoudonotunderstandwhatyouarereading.Whenyouareconscio

GenerationsofAmericanshavebeenbroughtuptobelievethatagoodbreakfastisoneoflife’sessentials.Eatingbreakfastat

Icannotimagineatimewhen______tosolve.

Personalinterviewingismosteffectivewhenallthepeopletobeinterviewedarelocatedinarelativelysmallgeographicalare

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在Excel2010中，默认情况下，数值型数据在单元格中________。

普鲁卡因是常用的局部麻醉药，毒性较小，成人一次限量为1000mg。()

A．曲池B．曲泽C．尺泽D．少海E．小海属于手少阴心经的腧穴是

以下各项与存货有关的成本费用中，不影响经济订货批量的是()。

有甲、乙、丙三种盐水，浓度分别为5％、8％、9％，质量分别为60g、60g、47g，若用这三种盐水配置浓度为7％的盐水100g，则甲种盐水最多可用()g．

设A为3阶矩阵，|A|=3，A*为A的伴随矩阵．若交换A的第1行与第2行得矩阵B，则|BA*|=_______．

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