◎ 题干
When they awoke the next morning, they were surprised to find a ___ of fog floating in the air.
[     ]
A. cover  
B. blanket  
C. piece  
D. mixture
◎ 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 they awoke the next morning, they were surprised to find a ___ of fog floating in the air. [ ]A. cover B. blanket C. piece D. mixture …”主要考查了你对  【名词】  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。