what are those?改为单数

what are those?改为单数 What are those in English?（改为单数句） Are those apples 改为单数 she is nurse (改为复数）What are those over there?(改为单数）These are apples and those are pineapples(改为单数)They are waitresses (改为单数)They are oranges (改为单数)They are apples (改为单数) What are those?改成单数 -What are those?-They are pencil-boxes.(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 Are those his friends?改为单数形式 Those are my friends 改为单数句 Are those your friends?(改为单数句) Those are some keys.(改为单数） those are orange towels改为单数句 Those are books 改为单数句子急 Those are erasers 改为单数形式 Those are rulers 改为单数形式 快 those potatoes are bad.改为单数句子