Question

【题目】_______ of the students _______ cleaning the windows now. The others are sweeping the floor.
A.Two fifths; are
B.Two fifths; is
C.Two fifth; is
D.Two fifth; are

Answer 1

【答案】A
【解析】句意：五分之二的学生现在在擦窗户，其他的在扫地。第一空考查分数的表达：分子用基数词，分母用序数词，分子大于一，分母加-s，所以CD错误；主语是students，谓语用复数，所以答案是A。