Read the dialogue below and choose the best answer for each blank space.

Ana : Hi, Rina. What are you doing?
Rina: Hi. I'm reading a novel.
Ana : ________________________________ (I)
Rina: Yes, it is my hobby. ___________________________ (II)
Ana : My hobby is singing. I love singing since I was a little.
Rina: Really? Actually I like singing too.
Ana : ________________________________ (III)
Rina: Yes, I have two hobbies. Reading novel and singing.

The best expression to fill the blank point (I) is ....