指示代词this/that/these/those — 英语填空题

根据人物与说话人的远近，用 this、that、these 或 those 填空。My mum is right beside me. ___ is my mum. My dad is by the far door. ___ is my dad. My two sisters are right beside me. ___ are my sisters. My grandparents are by the far door. ___ are my grandparents.