题目

.He was told that it would be at least three more monthshe could recover and return to work. A.when    B.before    C.since    D.that 答案：B 解析: B。由语境逻辑可以推出在他恢复健康重新工作之前要过至少三个月，因此该空应填before引导时间状语从句。

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