题目内容：

Is that girl ____ you operated on last month?
a.who b.the one c.whom
选B

优质解答

变陈述句：
That girl is _______ you operated on last month.
the one 作先行词,后面是定语从句,从句中operated后缺宾语,定语从句中关系代词作宾语可以省略