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 ter care made me feel warmly.
I will try my best to prepare the text for bfour. 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.
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