Coretta Scott King and Martin Luther King Jr. had been married for fifteen years before Doc. King was assassinated.
                    举一反三
- Martin Luther king Day is held on the third ______ of January, which celebrates the life and achievements of Martin Luther King Jr.
 - 中国大学MOOC:"Martin Luther King Jr. is most well-known for his ___________, and the Martin Luther King Day is to memorize him.";
 - Martin Luther King Jr. as well as many African Americans devoted themselves to ________________________.
 - Which city is Martin Luther King Jr’s birthplace and burial place?
 - 1) Martin Luther King, Jr’s action sparked protests by black residents.
 
