The following dialog is for questions 7 to 9.

Rangga: I heard that your sister is home.

Cindy: Yeah, she returned home last week.

Rangga: Has she finished her studies?

Cindy: Not yet. She is completing her research.

Rangga: How long will she stay at home?

Cindy: I have no idea. Why's that?

Rangga: I want to study Suomi. Since she has always been communicating in this language for these two years, she must understand it well.

Cindy: Are you planning to study there?

Rangga: I am. In order to chase my dream, I have to master the language. I only have three years ahead. Will she help me?

Cindy: I'm not sure. She is busy these days. I'll ask her, then tell you as soon as possible.

Rangga: Thank you so much.

Cindy: Ah, I almost forgot. This is for you.

Rangga: What is it?

Cindy: Have a look! My sister gave it to you.

Rangga: Is it from Finland?

Cindy: Certainly.

Rangga: Well, pass my gratitude to her.

Cindy: O.K. By the way, I have to go now. See you.

Rangga: See you.

How long has Cindy's sister been home?