Definition: If something is lost, no one knows where it is. Level: B1
我找不到我的钥匙了。
I can't find my keys. I think they are ___lost.
这张纸是失物招领处找到的。
This paper was found in the ___lost and found office.
当你搬新家时，东西常常会丢失。
Things often get ___lost when you move to a new house.
