那个自称是公司总裁的人其实是个冒牌货，他连办公室都不知道在哪。

The man claiming to be the company president was actually an ___imposter who didn't even know where the office was.

那个自称是医生的人其实是个冒牌货，他从未上过医学院。

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