Many experts say that Billy Wilder changed the history of American movies．He is often called the best movie maker Hollywood has ever had．

He was known for making movies that offered sharp social comment．Wilder was one of the first directors to do this．Between the middle l930s and the l980s，Billy Wilder made almost fifty movies．During that time he received more than twenty nominations（提名）from the Academy of Motion Picture Arts and Sciences．He won six of the Oscar awards．His movies have been seen by people around the world．

In l944，Billy Wilder made the film Double Indemnity．Some critics said this movie established him as one of the greatest Hollywood directors．Wilder directed The Lost Weekend in 1945．Ray Milland plays the part of an alcoholic writer in the movie．It shows that alcohol rules his life，yet he does not admit it．He hides alcohol in his home and says he is not drinking．

In l950，Wilder made Sunset Boulevard．This movie told of an aging actress in silent movies．She plans to return to movies though facing many problems．In l954，Billy Wilder became an independent producer．The next year，Wilder's first movie as an independent filmmaker was a huge success．It was The Seven Year Itch．In this movie，a married mail wants to cheat on his wife with some of his friends．In l959，Wilder made a funny movie that was very popular．It was Some Like It Hot．It tells about two jazz musicians being chased by criminals．They decide to wear women's clothes and join a band in which all the musicians were women．

Wilder died in March，2002．He was ninety-five．A current Hollywood producer said："Billy Wilder made movies that people will never forget．"

21．The text is mainly about___．．

A．the background of American movies

B．the development of American movies

C．Wilder's attitude to American movies

D．Wilder's achievements in American movies

22．What was Wilder famous for according to Paragraph 2？__