【问】 1. Everyone was in their room when the bell rang.(攻读硕士学位研究生入学英语试题，80 B)

2. Everyone is somewhat touchy about their home and personal property，they are tooprivate to be exposed to the inspection of strangers.(《英语考试题典》，吉林科技出版社，P455)

上面两道试题要求将their改为his。我认为，这里用their并没有什么错误。

【答】 正象语言学家们所指出的，everyone具有整体意义，因此与之有关的代词可采用复数形式：

1. Everyone thinks they have a right to be here. (CGEL)

所有的人都认为他们有权在这里。

2. Everyone has arrived，haven't they? (CGEL)

大家都来了，不是吗?

3. Everyone has their own ideas about it. (EED)

关于这件事每个人都有自己的想法。

更详细的情形，参见everybody...they(their)。