Three fourths of the homework _________ today. A．has done B．has been done C．have done D．
Threefourthsofthehomework_________today.A．hasdoneB．hasbeendoneC．havedoneD．havebeendon...
Three fourths of the homework _________ today. A．has done B．has been done C．have done D．have been done
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| B |
| homework 是不可数名词，它源旁的四分之雹陪橡三也是不可数名词，所以排除C，D;且homework 和do是动宾关系，所乱塌以要用被动语态。所以选B。 |
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