when I locked the door,I realized I () my key at home.这里填 left还是 _英语解答

when I locked the door,I realized I () my key at home.
这里填 left还是 had left,或者二者均可为什么?

人气：316 ℃　时间：2019-08-26 07:43:10

解答

had left
应为这一句明显有先后顺序
即先丢在家,再发现