【答案解析】[参考范文]
Dear Frank, Fred and Mike,
How have you been doing these days? I have just received the terrific pictures we"d taken during the holiday last month. It is for your warm hospitality and comprehensive guide that I"ve enjoyed a most wonderful journey, without which, I should say, it would never have been possible. It"s so kind and considerate of you to send me the photos and they will be my sweet memory for ever.
I have to say sorry for not writing to you for this long time. Piles of files were awaiting me when I returned from abroad so I buried myself in dealing with the delayed tasks and even forgot to write to you! What a leaky memory!
Yet I remember well that you had ever mentioned a possible journey to China. October is the best season for trips to many places of interest across this magic land. So write to tell me about your plan or schedule, and let me know if you have any questions or difficulties. I hope we"ll meet soon!
Best wishes!
Yours,
Rex