Question

Samuel Clemens , ______ Mark Twain , became a famous writer

1. A.
   was known as
2. B.
   known as
3. C.
   was known for
4. D.
   known for

Answer 1

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。