题目内容

— Why? Tom, your shirt is so dirty!
   — Mum, I __ my storeroom downstairs。
A. cleaned             B. have worked           C. was cleaning           D. have been cleaning

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网