◎ 题干
—Thanks a lot, Mr. Wang. I don't know how to ________ the help you gave me during my stay here.
—It's my pleasure. Welcome to China again when you have time.
[     ]
A. pay off  
B. pay back  
C. pay for  
D. pay to
◎ 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“—Thanks a lot, Mr. Wang. I don't know how to ________ the help you gave me during my stay here.—It's my pleasure. Welcome to China again when you have time…”主要考查了你对  【动词短语】  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。