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

问题补充：

. 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：

A. when

(答案→)B. before

C. since

D. that

解析：it was some time before…是一个很有用的句型，其字面意思是“在……之前过了一段时间”，通常可转译为“要过一段时间才会……”，如：It will be five years before we meet again. 五年以后再见。It may be a matter of months before it’s ready. 要准备好可能得数月时间。