They are healthy.(改为一般疑问句)The book is on the desk.(对on the desk提问)Today is Sunday.(对Sunday提问)

问题描述:

They are healthy.(改为一般疑问句)
The book is on the desk.(对on the desk提问)
Today is Sunday.(对Sunday提问)

Are they healthy?
What is on the desk?
What day is it today?

Are they healthy?
Where is the book?
What day is it today?