We were worried about you.You()home without telling us. A shouldn"t leave B shouldn"t have left为什么选B,求详细解答,O(∩_∩)O谢谢!

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We were worried about you.You()home without telling us. A shouldn"t leave B shouldn"t have left
为什么选B,求详细解答,O(∩_∩)O谢谢!

should have done 指:不应该做某事,但是实际做了.
We were worried about you.我们都担心你,说明你离家了.

由前一句“我们很担心你啊”可以推测出行为已经发生。(未通知就擅自离家)
因此选B