Mary is always using ＿＿＿pencil she often leaves hers at home.
问题描述：
Mary is always using ＿＿＿pencil she often leaves hers at home.
A,someone else's B,else someone's
C,someone else D someone's else
答
选A因为形容词修饰不定代词要放在后面,所以首先排除B,而这里需要一个名词所有格,所以排除C,表示某人的名词所有格要加在最后一个词跟前,所以D错误.