Is that girl ____ you operated on last month?

问题描述:

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

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