is it : They make fun and talk about each other behind their backs
or
They make fun and talk about each other behind their back
or is there a better sentence but doesn't change the meaning?
收錄日期: 2021-04-20 13:33:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130210222950AAyvKdg