Samuel Clemens， Mark Twain, wrote many popular stories.
A. was known as
B. known as
C. was known for
D. known for
网友回答
A. was known as
(答案→)B. known as
C. was known for
D. known for
解析：这题是过去分词做定语：be known as“做为…而著称”，known as Mark Twain修饰Samuel Clemens，句意是;以马克吐温著称的Samuel Clemens写了很多受欢迎的小说。选B。