Are those dictionaries here 改为单数是?

Are those dictionaries here 改为单数是? those dictionaries are in the drawer改为单数句 Are those apples 改为单数 what are those?改为单数 They are some good dictionaries.改为单数句怎么改 Those are my sisters改为单数形式是? Those are our hats.改为单数 Those are my friends 改为单数句 Those are rulers 改为单数形式 快 those are orange towels改为单数句 are those japanese cars?改为单数形式 Those are oranges（改为单数句）