The boy was having a class when the earthquake broke out in yushu. He could have been killed if he with his family.
A．had stayed
B．stayed
C．would stay
D．is to stay
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◎ 知识点
根据n多题专家分析，试题“The boy was having a class when the earthquake broke out in yushu. He could have been killed if he with his family.A．had stayedB．stayedC．would stayD．is to stay…”主要考查了你对 【一般现在时】，【将来进行时】，【过去完成进行时】，【过去将来时的被动语态】 等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。
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