These are cakes 改为单数形式
These are cakes 改为单数形式
these are new books.改为单数形式
these are chinese books 改为单数形式
are these apples?改为单数形式
Are these sheep怎么改为单数形式
Are these your cousins改为单数形式
These are English books.改为单数形式
are these your books?改为单数形式
these are apples 改为单数形式
These are apples改为单数形式
those are cakes单数形式
These are my English books.改为单数形式