Whose book are these They are him her Mr.Green's老师说的是 Mr.Gre

Whose book are these They are him her Mr.Green's老师说的是 Mr.Gre -Who are these white birds?-They are Mr Green's.这句话哪里错了 Are you Mr Green? 单项选择：Whose book are these?They are （ ）. ——Whose book are these?——They`re( our )books 为什么是our? Mr Green's family are sitting at the ___ ____dinner Whose keys are these?They’re Lucy’s.是什么意思? 英语翻译I'm Mr.Green.There are four people in my family.They are whose is this book Whose are these books whose pens are these?____(these/they) are mine MR green with his children are/is? Mr and Mrs Green are going( ).