1. What is Ms. Chan doing?
She is writing a letter.
That's interesting.
2. What is he doing?
I'm reading a book.
Is it interesting?
3. What are you doing?
Frank (is).
Oh. It sounds good.
4. Who is singing that song?
The children are.
That's great.
5. Who is washing the dishes?
I'm going to the library.

6. Where are you going now?
 Oh. That's nice.
Okay. Have fun.