1-Are those your sons?(改为单数形式） 2-Are those his keys?(改为单数形式）

题目

1-Are those your sons?(改为单数形式） 2-Are those his keys?(改为单数形式）
zoo（改为复数形式 ）
This is my brother.（改为一般疑问句）
Are your her sister?(作否定回答）

答案

1 Is that your son?
2 Is that his key?
3 zoos
4 Is this your brother?
5 No,I am not