假设你叫周阳，你收到你的澳洲朋友Frank的来信，他说他最近迷上了打网球，并建议你也开始练习这项运动。请用英语给Frank写一封回信。你的回信应包括下列内容：
1. Your appreciation of his letter and his suggestion;
2. Why it is impossible for you;
3. Your way of exercise;
4.…
注意：
1.回信要求包括上述内容并说明理由；
2.词数：120左右；
3.回信的开头和结尾已经为你写好，不计入总词数。
Dear Frank,
Hi! Thank you very much for_______________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
Talk to you soon.
Yours truly,
Zhou Yang