◎ 题干

-– I wonder how much you charge for your services.
--- The first two are free         the third costs $30.  
A.whileB.until C.whenD.before
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“-– I wonder how much you charge for your services.--- The first two are free the third costs $30.A.whileB.until C.whenD.before…”主要考查了你对  【并列连词】【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。