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

—DoyouknowJimquarreledwithhisbrother?—Idon’tknow,______.

Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,【56】thisislarg

Sorry,officer.I______at80milesbutIdidn’tseeanysignintheareatellingpeoplehowfasttheycandrive.

Vickyhasbeensadrecently,forherplantogotocollege______atthelastmoment.

Asyoumightexpect,thestatueisverybig.Visitorscanrideanelevatorfromthegroundtothebottomofthestatue.

Thecommittee______aconclusiononlyafterdaysofdiscussion.

TheWorldTradeOrganization(WTO),foundedonJanuary1,1995,aimstoencourageinternationaltradetoflowasfreelyaspossi

Atthreeo’clockthismorning,Iseemed______someonescreaminginthestreet.

Amansitsaloneataworkbench,startingatapieceofequipmentwithapuzzledfrown(皱眉).Hesays:"SoifIputredfourthere,

Youe-mailiswellwritten______somespellingmistakes.

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公司型基金与契约型基金的主要区别是()。

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幼儿园活动区出入口的地面上一般会有几双小脚印的图示，此环境创设有利于培养幼儿在活动区的()意识。

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