he gave us a nod and murmured a yes after (what)seemed like hours.为什么不是that/which/it
问题描述：
he gave us a nod and murmured a yes after (what)seemed like hours.为什么不是that/which/it
答
what 这里和 that which 有相同作用,
从句的另一个说法是
after (a period of time which) seems like hours
what 就是 a period of time which的替代词