根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。

A: Hello, Nina! I haven't seen you for two weeks.

B: I just came back from Qingdao.

A: Did you go there for vacation?

B: No, for training. I joined a football team last month.

A: That's the news to me.

B: No, but now, I'm interested in all sports especially football.

A: You look much healthier than before.

B: Yes, I always felt awful in the past. But now,

A: That's because you've got enough exercise.

B: I think so. Exercise helps me to keep fit.

A:

B: I play football three times a week.

A: I often have a headache these days.

B: Have you done any exercise?

A: No. I haven't done any exercise since I got my computer.

B: You shouldn't spend too much time in front of your computer. Why don't you go and play football with me?

A: That's a good idea!