Тему не уточнили, так что напишу что-то нейтральное.
One day, when I was walking with my dog, I saw a man in a black coat, which was so long, so I can’t see his legs. My dog began to bark at him without a reason. The man got scared and jumped back. I tryed to calm down my pet, but it was in vain. When my dog bited him, he suddenly put off that coat and i figured out why my dog was so aggressive - there was a piece of meat in the pocket of man’s coat.
One day, when I was walking with my dog, I saw a man in a black coat, which was so long, so I can’t see his legs. My dog began to bark at him without a reason. The man got scared and jumped back. I tryed to calm down my pet, but it was in vain. When my dog bited him, he suddenly put off that coat and i figured out why my dog was so aggressive - there was a piece of meat in the pocket of man’s coat.