单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．They don’t get rid of loose arm.
B．They can damage arm muscles.
C．They aren’t acceptable to most people.
D．They can raise one’s blood pressure.

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Questions 22 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。