When first to the market, the puter software was not a success due to its plexity in operation.
A. introducing
B. being introduced
C. introduced
D. to be introduced
网友回答
A. introducing
B. being introduced
(答案→)C. introduced
D. to be introduced
解析：考查非谓语动词。本题为过去分词作状语，与逻辑主语the puter software为被动关系，故选C。