◎ 题干
I guess we've already talked about this before but I'll ask you again just ____.    
[     ]
A. by nature  
B. in return  
C. in case    
D. by chance
◎ 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 guess we've already talked about this before but I'll ask you again just ____.[ ]A. by natureB. in returnC. in caseD. by chance…”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。