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Passage 1 Questions 25 to 27 are based on the passage you have. just heard.

A．They are rarely used today.
B．They have a lot of uses.
C．People often carry rulers with them.
D．Every schoolchild has a ruler.

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Passage 1 Questions 25 to 27 are based on the passage you have. just heard. 您的浏览器不支持 audio 元素。