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。Introduce与the puter software为为动宾关系故用过去分词作状语。句意：电脑软件初次引进市场是由于操作复杂没有成功。