选C.
翻译：过了大概许多年以后,这个女演员才终于露面,这让记者和观众都感到失望和气愤.
until强调动作的持续,比如：I kept watching TV until the midnight.原句里的it took seemed to be years虽然有动词,但并不是一个动作,所以用until不对.如要用until需要换成not until直到……才：The actress didn't turn up until years later.
Before有“一段时间……才……”的意思.通常就是用于原句的用法.例：It took him two years before Lisa agreed to get married with him