填空题 If one does not pick up (his) dry-cleaning (within) thirty days, the management is not (obligated) to return it (back).
A. his B. within C. obligated D. back

  • 1、
【正确答案】 1、D应将back删掉。    
【答案解析】[解析] return本身就是“返回”的意思。