Johnny Carson began his career in television____40____ his twenties. First he worked at local stations in Nebraska. Several years___41____, he moved to Los Angeles, California. It was “The Tonight Show” ___42_____ made Johnny Carson famous for thirty years. He became ___43____ most popular star of American television. He ___44____(call) “the king of late night.” Critics said Americans from all parts of the country liked him and felt they knew him. He did not take his fame ____45___ (serious). For example, when asked___46____ he became a “star”, he answered: “I started in a gaseous (气体的) state and I cooled.” Carson’s special skill was his sense of humor. Audiences laughed at his jokes he made at the ____47____(begin) of his show. However, sometimes they laughed ___48___ harder at the jokes that failed. He was the most powerful performer on television. Many comedians(喜剧演员) and singers became ___49____(succeed)after appearing on “The Tonight Show”.