改错改错Is that a pencil case?Yes,it's.

改错改错Is that a pencil case?Yes,it's. That is my a yellow pencil sharpener.改错怎么改啊! Is this pencil your?改错 What is this?----This is a pencil sharpener改错 单句改错where is your a pencil?k快 What's colour is the pencil 改错 改错：it is that a boy? That is her a red pen.改错 Is that a old book改错 This is a b and that is a f改错 Whose is that boy?改错 Is that red bus 改错 Is that English bus?改错. This is a apple.That's a pear.改错. 改错:（Is ）（that ）a（ your） pen? 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