Change passive to active sentences
Stefan was bitten by a dog. The muzzle the dog had been wearing was broken. Stefan was taken to the hospital by a friend. Stefanís wound was given a quick look. It was determined that Stefan needed stitches. A shot was the other bit of treatment he received. A lesson was learned by Stefan. A strange dog would never be petted by him again.
A dog with a broken muzzle bit Stefan. A friend took Stefan to the hospital. The doctor quickly determined that Stefan needed stitches and a shot. Stefan learned a lesson; he would never pet a strange dog again.