It's my pencils.改为复数形式

It's my pencils.改为复数形式 It's my backpack.改为复数形式 This is my pencil.（改为复数句） It's his backpack.（改为复数句） It's my pencil case.和She's her mother's good daughter.改为复数句. 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 It's an orange orange 改为复数改为复数 It is my pen.(改为复数形式) It is my friend.改为复数句. that s my brother改为复数句 It‘s a pear 改为复数句 It's a photo.(改为复数句) It's a notebook改为复数句子 It‘s a nice photo 改为复数 it's sweet改为复数形式 It‘s in the bookcase 改为复数 It's a good dictionary.改为复数 The long pencils are my sister's.(改为一般疑问句）怎么改? Who is she?She's my teacher What's that?It's a renily--box改为复数形式