His keys are ______ the lost and found case. A. on B. in C. with D. at 选哪一个?
问题描述：
His keys are ______ the lost and found case.
A. on B. in C. with D. at
选哪一个?
答
B. in 在。。。里面
答
in
in the lost and found case 在失而复得的盒子里