He left the knife ___he had found it

He left the knife ___he had found it he left the knife _____he had found it Alice left the book where she had found it. When he came back,he found the bag he had left ______ over t 33.he found the girl they had left behind ___in a corrner___ we found the key where she had left it 是宾语从句还是状语从 we found the key where she had left it.是个什么从句 we found the key__he had left it.请问填什么呀?为什么? I found my books I had left it.为啥用where不用the i found my unbrella where i had left it It was after he got what he had desired ___he realized it wa he found it diffcult adjust as he had worked in the same off