◎ 题干
All people,           they are old or young,rich or poor,have been trying their best to help those in need
since the disaster.
A. even if
B. whether    
C. no matter
D. however
◎ 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“All people, they are old or young,rich or poor,have been trying their best to help those in need since the disaster. [ ]A. even ifB. whether C. no matterD. …”主要考查了你对  【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。