那个自称是公司高管的人其实是个骗子，连办公室在哪都不知道。

The man posing as a company executive was revealed as an ___imposter when he couldn't even locate the office.

那个自称是医生的冒牌货实际上从未上过医学院。

The man claiming to be a doctor was actually an ___imposter who never attended medical school.