of the water in this cup splashed onto the floor.
A. Three quarters; is
B. Three fourth; is
C. Three fourths; are
D. Three quarters; are
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(答案→)A. Three quarters; is
B. Three fourth; is
C. Three fourths; are
D. Three quarters; are
解析：考查主谓一致。分数在英语中通常是借助于基数词和序数词来共同表达的。其中基数词表示分子，序数词表示分母。分子除用one外，也可用a；如果分子大于1，分母要用复数形式。谓语动词是用单数还是复数取决于名词，即与分数所修饰的名词保持一致。句意：这杯水中的四分之三的水都撒到地板上了。故A正确。