Traditionally it has been common practice for schools to seek to maintain discipline and control misbehavior via the ______ of authority and the employment of sanctions as punishments.

单项选择题He can also take over the parenting role and provide her with ______ from the rigors of what is a twenty-four-hour-a day job.

单项选择题They rarely study natural events, and only in so far as they ______ on the human world.