Your book is_____the lost and found case横线里填什么?

Your book is_____the lost and found case横线里填什么? Your book is____the lost and found case横线里填什么? 用适当的介词填空Your book is___the lost and found case. book,that,is,the,found,case,lost,your Is that yuor book ( ) the lost and found case? Is that you book in the lost and found case? Is your notebook on the lost and found case? Lucy,your hat is in the lost and found case. in the that your and lost found case key is Please l_ at your book .横线里填什么 Your ID card is in [ ]case.A lost and found B the lost and f Is this your watch in the lost and found case?怎么翻译?特别是case