行政处罚
参考答案：主管行政机关对公民、法人和其他组织的违法行为予以追究行政法律责任的一种行政执法行为。
__________ abroad for two years ,he will come back within two weeks
A Having studied B Studied C To study D Studying
简述20世纪以来几个主要的教育学派。
