Your backpack is in the case.A. lost and foundB. found and lostC. lose and foundD. find an

问题补充：

Your backpack is in the case.

A. lost and found

B. found and lost

C. lose and found

D. find and lose

答案：

(答案→)A. lost and found

B. found and lost

C. lose and found

D. find and lose

解析：lost and found case 失物招领箱，东西应是先丢后捡到，因为都是发生过的事，故应用过去时态，选A。