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: Hi, Linda. I haven't seen you for days. ?

B: I was ill last week. I had to stay at home for several days.

A: Oh, I'm sorry to hear that. ?

B: Yes, I did. I took some medical tests and the doctor told me that I just got a fever.

A: I see. How are you feeling now？

B: . So I am back to school today.

A: I think you'd better take more exercise. By the way, have you ever been to the new sports center？

B: Not yet. What can we do there？

A: .

B: Sounds interesting. ?

A: It's only 2 kilometers away from here.

B: Great! Let's go there after school.