将下列单数句改为复数句 Is this your pencil?Is that your cousin?Where is your key?

问题描述:

将下列单数句改为复数句 Is this your pencil?Is that your cousin?Where is your key?
Is it on the chair?This is a dog.

Are these your pencils?
Are those your cousins?
Where are your keys?
Are they on the chairs?
These are dogs.