Those are erasers 改为单数形式

Those are erasers 改为单数形式 Those are erasers.(改为单数句） Are those erasers?改为单数句 Are those her erasers改为单数句 Those are erasers.改为单数句型拜托各位大神 Is this a bus?(改为复数形式） Those are erasers.(改为单复数形式） Those are rulers 改为单数形式 快 are those japanese cars?改为单数形式 Those are her photos改为单数形式~ Those are oranges 改为单数形式 Those are gloves改为单数形式 Are those his friends?改为单数形式