He was told that it would be at least three more months he could recover and return to work.
A. when
B. before
C. since
D. that
网友回答
A. when
(答案→)B. before
C. since
D. that
解析：考查时间状语从句。句意：据说，至少要过三个多月，他才能恢复过来并返回工作上。A当；B在......之前；C自从；that无意义。It will be+时间+before...“在......之前，还要过多久”，是固定句型。故选B。