答案:
One possible version:
Dear Susan,
I'm sorry to hear that you are having trouble adapting to
your new school life in America,but this situation can be easily
changed if you take my advice.First,you should work hard at
English,which can give you more opportunities to communicate
with others.Secondly,why not make some friends?They can
help you to forget your loneliness.Thirdly,it would be a good i-
dea if you take an active part in all kinds of activities,which will
help to make life more interesting.By doing so,you will be hap-
pier with your new life soon.
I hope you will find these ideas useful.
Yours,
Li Hua