假如你是李明，最近参加了一期澳大利亚冬令营活动，共两周时间。你住在johnson夫妇家中，他们为你提供了吃，住，行及旅游

Dear Mr. and Mrs. Johnson, I’m writing to you from my home in China. I returned home safe and sound. When I think of the wonderful two weeks I spent in Australia, I just can’t help thinking of both of you. It was so kind of you to have provided everything to make my staying there such a happy and lucky experience. I’ve learned so much, not only English but also culture. And I really enjoyed a great deal the fun and laughter we shared with each other. Thank you very much. I’ll always remember this trip as well as your kindness. I’ll keep in touch and write to you later. Please take care!