1. The document provides vocabulary words and example sentences to practice using those words. The vocabulary words include knocked down, offending, vigorously, artificial, potential, victim, extremely, severe illness, assess, and victims. 2. Example sentences use the words in contexts like being hit by someone, exercising karately and strongly, comparing natural to artificial flowers, removing the object causing choking, and teachers evaluating students with tests. 3. The document is a vocabulary building exercise that exposes the reader to new words and practices using them correctly in different sentences.