He was told that it would be at least three more months _______he could recover and return to work.
A．whenB．beforeC．sinceD．that
B

試題分析：考查時間狀語從句。句意：據(jù)說，至少要過三個多月，他才能恢復(fù)過來并返回工作上。A當(dāng)；B在......之前；C自從；that無意義。It will be+時間+before...“在......之前，還要過多久”，是固定句型。故選B。
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