改为一般疑问句,并作肯定和否定回答

问题描述:

改为一般疑问句,并作肯定和否定回答
I'm in Grade 1.
You are areworkers.
This is my book.
Tha is an English dictionary.
是You are workers.打错了

What Grade are you in?
What are you?
Whose book is this?
What is this?