改错here is nice backpack This is my book（变复数句）

Those are his parents (变一般疑问句并做否定回答）
yes it is（变复数句）
急！！！就今天，越快越好！

---

Here is a nice backpack.These are my books.
Are those his parents?No,they aren't.
Yes,they are.

---

Are those his parents?
No,there aren't.

---

are those his parents ? yes they are.

---

here are nice backpacks.
these are my books.
Are those his parents?
yes,they are.
(注意句子开头银斗大写洞搏谨）
完毕纳基。

---