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    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 B 解析 本题考查时间状语从句的引导词.由It+be+时间段+before从句“要过多久才-- 可知.此处用before.句式“It is/has been+时间段+since从句 .表示“自从--以来已有-- . 【查看更多】

     

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