公共英语感谢信directions:while your family was on vacation, your friend, mary looked after your dog, smart. now you came back, write a letter to her to show your gratitude.your letter should be no less than 100 words. you dont need to write the address. dont sign your own name at the end of the letter; use “li ming” instead.dear mary,i am writing to express our heartfelt thanks for your taking good care of smart while we were on holiday.he was such a happy dog when we got home.