It was announced that only when the fire was under control to return to their homes. A.the residents would be permitted B.had the residents been permitted C.would the residents be permitted D.the residents had been permitted 答案 C 解析 句意为:据宣布.只有在火势被控制住的时候居民们才被允许回到家中.that从句中only引导的时间状语从句位于句首.that从句需用部分倒装结构. 【
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