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题目
题型:不详难度:来源:
Three fourths of the homework _________ today.
A.has doneB.has been doneC.have doneD.have been done

答案
B
解析
homework 是不可数名词,它的四分之三也是不可数名词,所以排除C,D;且homework 和do是动宾关系,所以要用被动语态。所以选B。
核心考点
试题【Three fourths of the homework _________ today.A.has doneB.has been doneC.have do】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
-Sorry for keeping you waiting.
-Never mind. I________ here only a few minutes.
A.cameB.comeC.wasD.have been

题型:不详难度:| 查看答案
I should say sorry to you but I ____trouble.    
A.did not mean causing B.did not mean to cause
C.meant causing D.meant to cause

题型:不详难度:| 查看答案
My neighbour came to ask me why there was so much noise in my house yesterday afternoon. I told her that some children          an English song.
A.praticedB.would practiceC.have practicedD.were practicing

题型:不详难度:| 查看答案
—Excuse me, but could you please turn the radio down?
—Sorry, I       you could hear it.
A.don’t realizeB.haven’t realizedC.didn’t realizeD.hadn’t realized

题型:不详难度:| 查看答案
A Frenchman who lost his arms and legs successfully swam across the Channel, a challenge he           for two years.
A.has been preparingB.had been preparing
C.has preparedD.prepares

题型:不详难度:| 查看答案
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