those are boys.改为单数句

those are boys.改为单数句 改为单数句:Those are orange oranges. those are my brothers.改为单数句 Those are my friends 改为单数句 Are those your friends?(改为单数句) those are orange towels改为单数句 Are those pens改为单数句 Are those her erasers改为单数句 Are those erasers?改为单数句 those are his sistexs 改为单数句 those are cars 改为单数句 Those are old storybooks.(改为单数句) those are fresh cucumbers改为单数句 Are those your cups?改为单数句 What are those in English?（改为单数句） ''There are some photos on those desks''改为单数句 Those are my shoes.怎样改为单数句?急 Those are English girls(改为单数句）