【正确答案】
C
【答案解析】[听力原文]6-7
W: Hi, Mr. Wells.
M: Good morning, Xiao Min.
W: I heard that you are going to travel to Singapore?
M: Right after your Spring Festival.
W: Then when will you be back?
M: I've no idea. There are still lots of countries on my plan to visit.
W: So how many countries have you finished?
M: China is the third station, and I have stayed here for more than half a year till the Festival.
W: Will you come back again?
M: Surely I will.
6. How many countries has the man visited?
[解析] 文中说道“China is the third station”，而且从对话中可以判断他已经在中国了，所以至此他已经旅游了3个国家了。