◎ 题干
Is it true that light travels in a straight line and never ______ ______ it hits something that reflects it.     
 [     ]
A. turns; until  
B. bends; unless  
C. breaks; when  
D. changes; until
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Is it true that light travels in a straight line and never ______ ______ it hits something that reflects it. [ ]A. turns; until B. bends; unless C. breaks;…”主要考查了你对  【从属连词】【动词】  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。