these are apples and those are pineapples(改为单数

Are those apples 改为单数 are these apples?改为单数形式 these are our apples改为单数句子 these are apples 改为单数形式 These are our apples改为单数 These are apples改为单数形式 改为单数句These are apples Those aren it any oranges Those are apples.谁会改（改为单数形式） they are apples改为单数 句型转换：Those are apples(单数句)( What are these?They are apples.(改为单数句子)That's a bus.(改为复数句子) what are those?改为单数