◎ 题干
The boy didn't feel completely ________ when he was asked to sing a pop song before the whole class.
[     ]
A. in surprise  
B. at ease
C. in danger  
D. at present
◎ 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“The boy didn't feel completely ________ when he was asked to sing a pop song before the whole class.[ ]A. in surpriseB. at easeC. in dangerD. at present…”主要考查了你对  【介词和介词短语】  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。