—Your watch is so beautiful. It must be expensive.—Not at all. I only ￥20 on it. A. cost B

发布时间：2020-08-21 16:27:54

—Your watch is so beautiful. It must be expensive.
—Not at all. I only      ￥20 on it.
A. cost                     B. spent               C. paid          

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解析：根据几个动词的用法，cost的主语为物，spent 与paid的主语为sb，其结构为sb+spent money +on sth。故选B
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