The following dialogue is for questions 11-15. 

Ivan: How will you spend this school vacation?

Dona: I'm going to spend it in Singapore. 

Ivan: Oh, and how long will you stay there?

Dona: About a week. My family and are going to leave tomorrow.

Ivan: Have a great journey, then. 

Dona: Thank you, Ivan. What about you? How will you spend the vacation?

Ivan: I'm going to take a maths Olympiad course. I must prepare myself for this year's competition.

Dona: Gee. You're such a hard worker.

Ivan: Ha ha ha ha! I don't think so.

Dona: Well, I hope your course runs well. I believe you'll soon master math.

Ivan: Thank you. I do hope so.

What does Ivan say about Dona's vacation plan?