These are rooms.(改为单数句)
These are boxes. (改为单数句)
These are oranges.(改为单数句)
These are eggs.(改为单数句)_ _ _eggs.
THese are orange pencil cases (改为单数句)
These are English cars.(改为单数句)
Are these nice pictures 改为单数句
These are his brothers 改为单数句
These are yellow purses.(改为单数句)
These are dishes 改为单数句
These are my pencils改为单数句
These are his watch.改为单数句
are these old coats 改为单数句