Look!This is my calssroom.Some_____are in the calssroom.Look at_____desk over there.That's the_____desk.There is a bookcase,too.______the bookcase,there are some______.What's that?It's round.Oh,it's Jim's______on the floor.And______keep our pencils______notebook in our desks._____our desks we put______schoolbags.【填合适的单词的适当形式：our baseball teachers‘ and in under book we desk that