怎么把Are those your keys改为单数形式?

怎么把Are those your keys改为单数形式? your,are,apples,those怎么组 Are those books (your) are those your maps? are those your lambs? 怎么把这些英语句子改为单数,急.These are booksThese are quiltsThose are orangesAre thiese your watches?Are those his dictionaries?They are mapsThose are his rings 怎么把Are those your parents?改成肯定句还有遇到其他这样的题目怎么回答 Are those your shoes?怎么变成肯定回答 Are those your storbooks on the desk?怎么翻译? are those your friends是什么意思 Are those your pencil s____? Are those your ruler?改错 where are those your books? Are those your pencil s( ) are those your kooks?---yes【 】 these are (they)books.those are (your) Those are your books.改为单数形式要怎么改?------your--------.是这样的回答形式。 what are those in your bag?怎么回答Where is your pen?呢