用单数.如: Ask any student which subject he or she hates most,9 out of 10 students will answer math. (问任何一个学生他或她最讨厌哪一门课程,10个有9个会说“数学”.) 偶尔有复数的,如: You can have any three items of clothing you like for £30. (花30英镑,你就可以买你喜欢的任意三件衣服.) 【句子中的three items是作为一个整体来看的】