◎ 题干
It's so kind of you to help us. Without your help, we couldn't have finished the work___________.    
[     ]
A.in a time                      
B. at no time    
C. ahead of time                  
D. behind time
◎ 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“It's so kind of you to help us. Without your help, we couldn't have finished the work___________.[ ]A.in a time B. at no timeC. ahead of time D. behind t…”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。