◎ 题干
When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.
A.no matterB.whetherC.howeverD.even though
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.A.no matterB.whetherC.howeverD.even thoug…”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。