◎ 题干
— I ______ have turned on the air conditioner at such a low temperature.
— No wonder you've got a cold.  
[     ]
A. shouldn't  
B. couldn't    
C. mustn't    
D. needn't
◎ 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“— I ______ have turned on the air conditioner at such a low temperature.— No wonder you've got a cold.[ ]A. shouldn't B. couldn't C. mustn'tD. needn't…”主要考查了你对  【情态动词】  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。