Sam, your books are on the floor. Please pick___ (it/them) up.

Sam, your books are on the floor. Please pick___ (it/them) up. Are( )your books here? Are those books (your) Are these books ( )(your)? Are they your books?还是Are these your books?为什么? John,are these books----(your) where are those your books? these are (they)books.those are (your) These are your books.变一般疑问句 are these your books?改为单数形式 Are these your books?肯定回答 Look!Are ( ) your books over there? These are your books.(改为单数) your,are,books,those连词成句 These are------------ your books中间是什么 are those your books 作否定回答 Are those your books的同义句 Are these your books?作否定回答