问题
选择题
It was announced that only when the terrible disease was under control _______ to return to their homes.
A．the residents would decide
B．would the residents decide
C．would the residents be decided
D．the residents would be decided
答案
答案：B
题目分析：考查部分倒装句：only+副词，介词短语，状语从句放在句首时，主句谓语用部分倒装，将be动词，助动词，情态动词放在主语前面，这句话only后面接时间状语从句，位于从句的句首，后面的主句要倒装。句意：人们宣布只有当可怕的疾病被控制住，居民才决定回家。the residents 和decide是主动关系，选B。