单选题 He said he was an insurance salesman, but later on she discovered he was a(n) ______.

【正确答案】 D
【答案解析】他说他是卖保险的，但后来她发现他是个骗子。fraud骗子；alien外侨，外国人； counterpart(职位、性格等方面)相对应的人；client委托人，顾客。