Sentence 1：Only if the jobless arrive at the jobcentre with a CV, register for online job search, and start looking for work will they be eligible for benefit-and then they should report weekly rather than fortnightly.

必备词汇和短语：CV(curriculum vitae)简历;be eligible for有资格的，符合……的条件;benefit利益，好处，救济金;fortnightly每两周地，两周一次地

主干：will they be eligible for benefit-and then they should report weekly rather than fortnightly,and连接的并列句

条件状语从句：Only if the jobless arrive at the jobcentre with a CV, register for online job search, and start looking for work，only+状语位于句首，主句使用部分倒装(助动词/情态动词提到谓语前)

并列结构：arrive at the jobcentre with a CV, register for online job search, and start looking for work，谓语和宾语的并列

翻译：只有失业者带着一份简历到达就业中心，注册线上找工作，并且开始找工作，他们才有资格获得救济金——然后，他们应该每周报告一次，而不是每两周报告一次。