【拓展空间】2018-2019学年译林版高中英语必修一: Unit1单元尾核心要点回扣
【拓展空间】2018-2019学年译林版高中英语必修一: Unit1单元尾核心要点回扣第3页

challenge

challenging

encourage

encouragement

discourage

graduate

graduation

develop

development

donate

donation

independent

independence

depend