◎ 题干
I would appreciate _____________back this afternoon.   
[     ]
A. you to call                
B. you call    
C. your calling              
D. you are calling
◎ 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 would appreciate _____________back this afternoon.[ ]A. you to callB. you callC. your calling D. you are calling…”主要考查了你对  【动名词】  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。