It was announced that only when the terrible disease was under control to return to their homes．A．the residents would decideB．would the residents decideC．would the residents be decidedD．the resid 题目和参考答案——青夏教育精英家教网——

题目内容

9．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

分析据称，只有当这种可怕的疾病得到了控制，居民们才决定返回家园．

解答答案：B
根据句子It was announced that…可知，此句是it为形式主语的主语从句．由主语从句中"only when-从句"即"only+状语从句"置于句首可知，句子需部分倒装．再结合主语the residents与谓语动词decide之间构成主动关系可知，其倒装结构为"would the residents decided"．故选B．

点评当only置于句首时，三种情况下，主句部分倒装，其结构为：①only+状语从句（从句不倒）+助动词/情态动词/be+主语+谓语剩余部分；②only+介词短语+助动词/情态动词/be+主语+谓语剩余部分；③only+副词（now/then）+助动词/情态动词/be+主语+谓语剩余部分．

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