Tom: Hello, Peter. What are you doing?
Peter: I'm reading a book.
Tom: What's your father doing?
Peter: He' s cleaning the floor.
Tom: Where's your mum?
Peter: She's in the kitchen. She's cooking.
1.Peter is reading a book. ( )
2.Peter's father is cleaning the floor. ( )
3.Peter's mother is cooking. ( )
4.Peter's sister is in the kitchen. ( )