题目

已知 ，则化简 的结果是() A . B . C . ﹣3 D . 3 答案：DListen and number. 听录音，给下列句子排序。    (     ) Debbie wears hats on her nose.(     ) The Diffos eat breakfast in the afternoon.(     ) The dog has my purple socks.(     ) They like to sing songs in the library.(     ) What's her favourite dessert?