Thsae are his brothers(变单数形式) That's his friend(变复数形式) Is this your sister?(做否定回答) Those are my friends,(变单数形式)

问题描述:

Thsae are his brothers(变单数形式) That's his friend(变复数形式) Is this your sister?(做否定回答) Those are my friends,(变单数形式)

This is his brother.Those are his friends.No,she isn't This is my friend.