新概念2 Lesson23Work on it had before my sister left.My sister left____it had begun.A after B withou C behind D soon2求这两句翻译.我有点不解.只答1个的就不用看了

新概念2 Lesson23Work on it had before my sister left.My sister left____it had begun.A after B withou C behind D soon2求这两句翻译.我有点不解.只答1个的就不用看了 新概念英语 2怎么样 新概念英语2笔记 新概念英语2, 新概念英语2 新概念英语2 新概念英语2 新概念英语2 新概念2答案详解 新概念2填空答案 新概念2答案 新概念2的题, 新概念英语2 新概念词汇大全 新概念语法大全 新概念2应该买一套吗 新概念英语2中的题用所给词造句：A frog/South America/Poisonous animal/on earth 新概念2第49课的句子.He carried the bed on to the roof of his house.这里的on怎么解释啊 on the list,in the list我记得是on the list的,新概念2,51课多项选择5题答案为in the list,请指教 英语-这的介词为什么不是on?新概念2习题答案-At Easter,people celebrate the coming of spring.为什么是at?在哪天不是on吗? 新概念2 lesson 15 急.新概念2 lesson 15 课文