How would you use the word abandoned in a sentence?

Is it true that baby bunnies who have contact with humans will be abandoned by their mother?

She wanted to go to Disney World, but when the kids weren't too excited, she abandoned the idea.

The police officers searched abandoned homes for the kidnapped child.

The teens like to sneak off and smoke in that old, abandoned shack.

i would like to make friendship with you, because my ex friend was too abandoned