题目

若（1﹣m）2+|n﹣2|=0，则m+n的值为（ ） A . -1 B . 3 C . -3 D . 2 答案：B The young man caught the thief ______. [    ] 　　A. with his arm    B. by the arm   C. in his arm   　　D. on the arm