原级：impropriety
1. Air Force's top acquisitions official urged the quick signing of the contract with Boeing even after Defense Secretary Donald Rumsfeld expressed concern about improprieties.
2. Foster referred to Clinton's handling of former President Clinton's sexual improprieties in the Oval Office.
3. improprieties
3. We will strengthen the administrative accountability system and investigate and prosecute administrative improprieties in accordance with the law.
4. The case is among several in which US military officers have been investigated, demoted or fired for poor behavior and sexual improprieties in the past year.
5. Four of his Cabinet ministers resigned due to financial improprieties, and his agriculture minister committed suicide over a scandal.