______ of the students was playing on the playground.[ ] A.None B.All C.Both D.No one
问题描述：
______ of the students was playing on the playground.[ ] A.None B.All C.Both D.No one
答
正确答案为：
A
句子中是was,所以主语是单数
而BC都是复数,后面要用were才对
No one 后不能与of连用,
所以只能选A
None of 没有一个
这些学生中没有一个人在操场上玩.