It requires no equipment, everyone knows how to do it and it carries the lowest risk of injury.
出自-2013年6月阅读原文
Determining whether different schools do or don't offer a high quality of education requires a look at man different measures, including students' overall academic accomplishments and their subsequent performance in college.
出自-2012年6月阅读原文
It requires him to work long hours.
出自-2010年6月听力原文