the prosperity which/that had never appeared before took on in the countryside 句子完整吗?

问题描述:

the prosperity which/that had never appeared before took on in the countryside 句子完整吗?
前面就一个先行词,不是一个句子.后面就是一个定语从句了.

这句句子正确.定语从句部分是从 which/that had never appeared before为止.去掉该部分,主句部分有自己的主谓.主:the prosperity 谓:took on 地点:in the countryside