work on ,work at. work at , work on 表示从事于某事情,但work at为一般用语,其深度不如work on. 例如:work at math 学习数学;work on math 致力于数研究;work on some wood cuts 创作一些木刻 1. Mr Zhao, an English teacher, sat up far into the night, a paper on how to teach beginners of English. A. and worked at B. and worked on C. working at D. working on 解:答案:D. work at为一般用语,其深度不如work on, work at a problem和work on a problem意思不大一样,前者可作学习中的“计算一道题”解,后者可引伸到生活和工作中的“研究或解决一个问题”. work out意为“计算出”. 2. You will have to work the weak points in your English if you want to pass the examination. A. out B. at C. for D. on 解:选A. work out解决;work on在…上工作;work hard at + subject在…科目上努力工作.