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。