第一篇是外语系写的 第二篇是我按你的要求写得简单点的。 要差一点，就叫他自己组合，改改单词，用他懂的单词改。 Dear Mary , In this letter I would like to convey my heartfelt thanks to you for your books about band four to me. The book is very useful especially for my reading and writing .I want to buy this book for a long time. Your generous help and tender care made me feel warmly. I will try my best to prepare the text for bend four. I have made a plan to finish reading this book before the exam coming. As the old saying goes, where there is a will there is a way. please don’t worry about me .I believe I can pass the exam. I will tell you the good news at the first time! I feel obliged to thank you once more. sincerely yours, Tom Dear Mary, I would like to thank you for your warm-heart help last term. I couldn't have passed the CET Band 4, if not had received your reference book on English Learning. It is more necessary to appreciate you because of your tender care and perfect consideration for me. I would never forget that night when you sent the umbrella to me at the library. Have you got free time in this summer vocation? If yes, I hope I have the honor to invite you to come to my home and enjoy the beautiful scene of my hometown. At last, I want to thank you again. Best wishes! sincerely yours, Tom 本文来源：https://www.wddqw.com/doc/77bccbdfa58da0116c17499d.html