Everyone got very excited when the large gift box opened可不可以改为Everyone got very excited when the large gift box was opened
问题描述：
Everyone got very excited when the large gift box opened
可不可以改为Everyone got very excited when the large gift box was opened
答
Of course
答
可以。
open作为及物和不及物动词都可以
答
可以
因为上面那句比较口语
下面那句比较书面