【正确答案】 Dear XX,
I am writing these few lines to express my sincere thanks to you for your help with my preparation for entering college.
You have been a qualified teacher and even a better friend. Thank you for making learning not a dull thing but a great joy. Your guidance and suggestion helped me to overcome difficulties in my study. In addition, your spirit of dedication and assiduous study have inspired me for a long time. You told me that proficiency in anything requires a great deal of determination and self-discipline Without your help, I would not have passed the college examination.
Thank you for illuminating my voyage of life with your own light of life. My true gratitude is beyond the word' s description.
Yours sincerely,
XX

【答案解析】 首先交代背景，如果外国友人来中国旅游，你会为他挑选哪个地方，然后重点要说明原因，最后总结。