How is eating bones
The dog is
And what is cat doing is it eating bones?
No,it isn't.It is drinking its milk.全部!
3. who is sweeping the floor?
Amy is.
And what's Anna doing? Is she sweeping the floor?
No, she isn't. She is making her bed.
4. Who is reading a book?
Sally is.
and What is Jack doing? Is he reading a book?
No, he isn't. He is opening some windows.
B
I beg your pardon?
What about John?