Sometime I don't understand what to call people. If it is an old man, I know I should say “Mr." with his last name. If it is a lady, I should use "Ms." or "Mrs." or "Miss" with her last name. When you use the title "Dr." it can be a problem. It's easy it is a medical doctor. You know that he or she has patients or works in a hospital. But there are some doctors who are not doctors of medicine. They are people with a lot of education, usually more than 7 years at a university. Sometimes they like to be called "Dr." too. I am never sure when I meet a "Dr.". Somebody whether I should ask that person about my headache or my schoolwork. 1. What is the best topic for the paragraph?

1. Understanding Titles
2. Understanding People
3. Understanding Names
4. Understanding People's Last Name​