单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. With a knife.
B. On the edge of some metal
C. On some glass.
D. On a piece of paper.

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单项选择题

单项选择题

Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。