I have lost my keys; I can't remember where I left it.这句话为什么去掉it_英语解答

I have lost my keys; I can't remember where I left it.
这句话为什么去掉it

人气：128 ℃　时间：2020-03-28 16:43:32

解答

前面说明了是keys,根据英语简洁的习惯,where I left后面不用重复；
而且,即使是用,也用them,不用it.