They are___ there

1,They are___(we) books.please put___(they)there.2,___you at There are some new kinds of books in the library.they are___ The cat't___.They are___. They are___(water)flowers at home. There are___ Chinese Zodiacs.填什么 ----how many staff are there in the office? ----there are___ Don't go and ___the doors and windows.They are___. Why don't you like pigs,Mary?Because they are___. -Are these___(he)books?-No,they are___(you).怎么填? These are___(we) pencils,and those are ___(they) pencils. They are___(the twins)空中应填什么? 英语填空题：There are___ ___on our national flag.