1.Everyone should do _ duty.A.one's B.his C.everyone's D.their
问题描述：
1.Everyone should do _ duty.A.one's B.his C.everyone's D.their
2.My father began to learn English A.in the forty B.in his fourties C.in his forties D.in his forty 选哪个 为什么
答
D 每个人都应该尽他们的义务.主语是everyone,大家,每个人,指总体,A是泛指不符合,B单数他的,不对,C很明显了.C 我的父亲四十多岁开始学习英语. in one's 加基数词,表达年龄的固定用法,后跟整十的复数形...everyone不是单数吗？everyone，形式上是单数，后跟的谓语动词也要用单数，is,has ...
但是everyone后可以用复数的代词来替换。是代词，不是谓语 。Has everyone finished their drinks?