Using passive voice:Couldn't we ask someone to take on the job privately without anyone knowing?
【正确答案】正确答案：couldn’t we ask someone to take on the job privately without being known?
【答案解析】解析：译文：难道我们不能私下里让一个人做这工作而不让任何人知道吗?不让任何人知道，即不让这件事被任何人知道，可将knowing变为被动形式being known，动作的发出者anyone可省略。