【题目】It took what seemed to be years _______ the football star appeared, which made the fans disappointed and angry.
A. when B. since C. before D. until
在线课程【答案】C
【解析】
考查时间状语从句。句意：过了若干年那位足球明星才出现，这使球迷们感到失望和愤怒。It takes/ is +一段时间+before…过了多久才……，这是一个固定句型。when当……时候；since自从；until直到。故选C。