i saw her wacthing tv in her bedroom just now.she ()be at home.1must2may3should填什么?详细解释

问题描述:

i saw her wacthing tv in her bedroom just now.she ()be at home.1must2may3should
填什么?详细解释

应该选must,因为这句话的意思是,我刚看到她在卧室看电视,她肯定还在家里。

选1
表肯定猜测都用must