in the IT company David decided to say goodbye and start his own business.A. Having ignor

问题补充：

in the IT company, David decided to say goodbye and start his own business.

A. Having ignored

B. To be ignored

C. Ignored

D. Ignoring

答案：

A. Having ignored

B. To be ignored

(答案→)C. Ignored

D. Ignoring

解析：ignore，忽略、忽视，与主语David构成动宾关系，因此本题选C，过去分词做状语。