补全对话, 每空一词。
A: Hello! May I ask you some questions?
B: Sure.
A: What's your name, please?
B: Thomas Ruzic.
A: You speak English well. How long 1._____ you 2._____ studying English?
B: For three years.
A: Oh. Have you 3._____ been to 4._____ English-speaking country?
B: Yes, I have. I was an exchange student in the United States 5 three months.
A: Really? When was that?
B: When I 6._____ thirteen.
A: 7 do you want to improve your English?
B: I want to 8._____ around the world, and I need English to do that.