His book is at the lost and found case.中有一处错误请改正

His book is at the lost and found case.中有一处错误请改正 His book is at the lost and found case哪里错了 改正 His book is at the lost and found case哪里错了 Is that yuor book ( ) the lost and found case? Is that you book in the lost and found case? Is that his ring( ) the lost and found case?A.at B.in C.on Look at the lost and found case.What's that?It's[ ]book.A th book,that,is,the,found,case,lost,your The keys in the lost and found case is his．哪里错? His keys are ______ the lost and found case. 请补全句子谢谢.M.his basketball is in the lost and found case. 连词成句is,game,his,lost,computer,found,and,the,in,case