单项选择题

Passage One Questions 26 to 28 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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单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。