第一篇：
Dear Billy,
I am very sorry to inform you I won’t be able to go to Yangminshan with you on the occasion of the Moon Festival because I just got a phone call from the U.S.A. Ma and Pa will be back ahead of schedule in order that they can get together with us on this special holiday. They of the older generation consider the Moon Festival a reunion day on which all members of a family are requested to be back home no matter how far apart they are. Under such circumstances how could I hurt their feelings by going with you to watch the brilliant moon on the night of the Moon Festival? I hope can understand my situation and put our appointment off till the day following the Moon Festival. I was told the moon on that day is much more beautiful than the one on the very day of the festival. Besides, we shall be able to avoid the holiday rush and enjoy the quiet under the moon. Do you think it’s a good idea? I am looking forward to hearing from you soon. Regards. Cindy.
第二篇：
Dear Wendy,
It is always a pleasure to know that everything is working out well with you. Thank you for your inviting me to go on holiday with you. Do you know how happy I was when I received your letter last week? I thought this would be a very good chance to see you again. I still remember the time when we chatted the night through, discussed our plans for the future and enjoyed together the beautiful scenery of Tainan. What a good time it was! It seemed everything would be OK with our plan to go to Tainan this weekend. But unfortunately one of our relatives who has been in the States for two years will visit us this Saturday and be our house-guest. My parents expect me to stay at home to help them do well by our visitor