It is my pen.(改为复数形式)

It is my pen.(改为复数形式) 问:It is my pen.(改为复数形式)答:____ ___our_____ This is a pen.(改为复数形式) It's a calculator改为复数形式It's a pen.It's my key.That's a clock.It's her book都改成复数形式 What is that?itis a pen改为复数形式 It's my backpack.改为复数形式 It's my pencils.改为复数形式 This is my sister.改为复数形式、 This is my friend 改为复数形式 That is my sister改为复数形式 she is my aunt 改为复数形式 This is my cousin.改为复数形式. that is my dress.改为复数形式 this is my pen pal改成复数形式 It is a dictionary改为复数形式 It is a watch.(改为复数形式) is it a bus改为复数形式 What is it 改为复数形式