改错:（Is ）（that ）a（ your） pen?

改错:（Is ）（that ）a（ your） pen? 改错：it is that a boy? That is her a red pen.改错 Is that a old book改错 改错改错Is that a pencil case?Yes,it's. Is this a English computer?(改错） This is a b and that is a f改错 改错:1.She is really a quite good girl.2.I have important something yo tell you. This is a apple.That's a pear.改错. (1/2)There is always that one person whocan send you a tent and cause yo Is this a ruler.---Yes,this is.（改错） Where is Chang Chuen?(改错) Good morning,teacher Wang（改错） This is a bottle of oranges(改错)Where is ChangChun?(改错) A bird is singing on that tree单词改错 That is a alarm clock.改错要对的 A bird is on that tree.单词改错 A bird is singsing on that tree.单词改错 Whose is that boy?改错 Is that red bus 改错