Definition: in the place where someone or something was before Level: B1
我懊恼地发现我把包落下了。
I was annoyed to discover that I'd left my bag ___behind.
派对结束后，几个人留下来帮忙清理。
After the party a few people stayed ___behind to help clear up.
公交车司机告诉他，一个手提箱被落下了，因为没有人认领。
The bus driver told him that a suitcase was left ___behind because nobody claimed it.
