改错:the map in the front wall is very good

改错:the map in the front wall is very good the map in the front wall is very old哪错了? 改错There is a map of world on the wall. the map is (on the wall). is there an old sofa in front of the wall? There is a map ( ) Canada ( ) the wall on the wall there is a map That is a map on the wall. We can see a map in beijing on the wall.改错句 there is a river in front of the house改错 my friend,jack is in front of the me 改错 There is a boy in the front of me改错