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。