Definition: highest in rank Level: B2
他是政府首席经济顾问。
He is the ___chief economic adviser to the government.
鲍勃·威尔逊，首席会计师，已经辞职了。
Bob Wilson, the ___chief accountant, had resigned.
她被任命为公司的首席执行官。
She was appointed as the ___chief executive officer of the company.
