题目内容
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 |
B
解析试题分析：考查连词辨析。before引导时间状语从句，意为“在……之前”，表示他康复重返工作还至少三个月时间。when引导时间状语从句，意为“当……的时候”。since引导时间状语从句，意为“自从”，表示从某个时候一直延续到现在，常与现在完成时连用。that用于名词性从句或定语从句。句意：他被告知还要至少三个月时间才能恢复且重返工作。故B正确。
考点：考查连词辨析
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