—How long will you graduate from senior middle school?
—It will be less than one year I graduate.
A. when
B. that
C. before
D. since
网友回答
A. when
B. that
(答案→)C. before
D. since
解析：考查状语从句。这里before引导时间状语从句，此处“It will be＋一段时间＋before...”，表示“还有多久就”，还有不到一年时间我就要高中毕业了。