摘要：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 be residents be permitted D. the residents had been permitted [解析]C句意:据宣称只有当火势得到控制的时候.居民们才可以返回家中.Only+when从句放在句首时.用部分倒装.时态应用过去将来时.

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