题目内容

Three fourths of the homework _______ today.
A．has finishedB．has been finishedC．have finishedD．have been finished
B
考查时态及主谓一致。句意：今天有四分之一的作业被完成了。可知本句描述的是现在已完成的动作。当前面有分数修饰时，谓语动词与被修饰词保持一直，homework为抽象名词不可数，故谓语动词用单数，选B。
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