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How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?
A.whenB.sinceC.beforeD.until

答案
C
解析

核心考点
试题【How many more decades will have to pass ____ scientists succeed in providing a c】;主要考察你对连词等知识点的理解。[详细]
举一反三

The question occurred to me ______ we were to get the machine needed.
A.thatB.whatC.whyD.where

题型:不详难度:| 查看答案

Advertising is different from other forms of communication _________the advertiser pays for the message to be delivered.
A.in whichB.in order thatC.in thatD.in the way

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_______ difficulties we may com across, we"ll help one another to overcome them.
A.WhereverB.WhateverC.HoweverD.Whenever

题型:不详难度:| 查看答案

______ might be expected,the answer to the question was very mixed.
A.AsB.ThatC.ItD.What

题型:不详难度:| 查看答案

I’m sorry you’ve been waiting so long, but it’ll still be some time ___ Brian gets back.
A.beforeB.sinceC.whenD.after

题型:不详难度:| 查看答案
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