问题
选择题
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
答案
答案：B
题目分析：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。