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

问题描述:

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)
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.