问题
选择题
Samuel Clemens, _____ Mark Twain, because a famous American writer.
A．was known as
B．known as
C．was known for
D．known for
答案
答案：B
考查非谓语动词。Be known as作为某种人物出名；known for以某事出名。句意：克莱门斯，以马克吐温的身份著名，成为一个著名的小说家。过去分词表示被动的发生过的动作，前面不用助动词，故选B。