◎ 题干
— What do you call this in English?
— It's a stamp. It ________ sending letters.

[     ]

A. was used to
B. is used as
C. is used for
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“— What do you call this in English? — It's a stamp. It ________ sending letters. [ ]A. was used to B. is used as C. is used for …”主要考查了你对  【动词短语】【一般现在时】  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。