联合国调查其驻也门机构的腐败行为

fraud – n. the crime of using dishonest methods to take something valuable from another person

humanitarian – adj. concerned with or seeking to improve human welfare

unqualified – adj. not having the skills, knowledge, or experience needed to do a particular job or activity

suspicious – adj. causing a feeling that something is wrong or that someone is behaving wrongly

contract(s) – n. a legal agreement between people or companies

confidentiality – n. the quality or state of being private

hire – v. to give work or a job to someone in exchange for wages or a salary

visa(s) – n. an official mark or stamp on a passport that allows someone to enter or leave a country usually for a particular reason