请按要求该写句子
问题描述：
请按要求该写句子
This is my family photo and that is his family photo.（改为复数形式）
Are those your desks?（改为单数形式）
Is that tirl your sister?（肯定回答）
Is Guo Kai your brother?（否定回答）
答
This is my family photo and that is his family photo.（改为复数形式）These are my family photos and those are his family photos./These are our family photos and those are their family photos.Are those...