their books are (in a desk )特殊疑问句

There are some books in their bags.------ ------ some books in their bags.改为同义句 There are some books in their bags 改为同义句 The students are engoying______(read) their books in the classroom. their books are (in a desk )特殊疑问句 there are somebooks in their bag同义句—— ----- some books in their bags Are them their books 改错 some of their books are ___English.A.in B.with 为什么是A There are more books in their library than my school错在哪里? because some of their books are written ----English 中间填什么.in .with .at . these are their books .用whose提问 Where are their books?这个表达对么? These are their books的同义句 ______(their)are ____(they)books. Are they their books?意思是什么 The students are putting their books,pencil-boxes____their school bags.A.into B.to C.in D.out They are filling their bags ____ books and other things.[ ]A.in B.with C.ofD.by There are some books that you maybe interested in.改病句There are some books that you maybe interested in.So much people try to improve their English in different ways. These exercise -books are ( ).括号是填their还是theirs?