◎ 题干
—I can't find my pen. Can I use yours?  
—Certainly, ______.    
[     ]
A. you are welcome      
B. it doesn't matter      
C. here you are      
D. there is
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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 can't find my pen. Can I use yours? —Certainly, ______. [ ]A. you are welcome B. it doesn't matterC. here you areD. there is…”主要考查了你对  【日常用语、谚语】  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。