He was told that it would be at least three more months he could receover and return to wo

问题补充：

He was told that it would be at least three more months he could receover and return to work.

A. when

B. before

C. since

D. that

答案：

A. when

(答案→)B. before

C. since

D. that

解析：考察连词。 A.当……时 B.在……之前 C.自从……以来 D.那个，引导定语从句。句意：他被告知在他完全康复重新工作之前，最好要有三个月的时间。故选B。