各位先进您好
下面两题是关系子句的答案
但是题目让我有点蒙
想请教一下
依照关系代名词的文法定义
先行词+关代(主格)+动词
但下列两个题目请问差异
1. One of the waitresses who _work_ in the cafeteria is a member of the band.
2. Linda is the only one of the girls that _is_ doing homework now.
依照文法规则,第一题的先行词是waitresses,所以work呈原型状态
但是第二题的先行词也是复数型girls,为何是单数be动词is?
感谢大神协助