【答案】
One possible version:
Dear Mr Woods,
How are you doing these days?
Although it has been a month since I came back to China,I
still relive those fascinating days once in a while.I owe so much
to you.Without your kindness,my stay there would have been
quite different.It is you who have opened a new world to me and
taught me to see the world from different perspectives.Looking
back,never had I known that a language could be taught and
learnt that way,which remains a guide to my English learning
and an inspiration for my future development.
I hope you can pay a visit to China and come to my home
someday when it is convenient for you.
Best regards.
Yours,
Li Hua