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：词义辨析。Be known as,作为……而著名；be known for，因……而著名。句意：Samuel Clemens，作为马克吐温而著名，写了许多受欢迎的小说。排除C,D；且句子不缺谓语，所以选B。