◎ 题干
You had better save your time ________.
[     ]
A. for a day    
B. all day 
C. in the day
D. in a day
◎ 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“You had better save your time ________.[ ]A. for a dayB. all day C. in the day D. in a day …”主要考查了你对  【不定冠词(a,an)】【介词】  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。