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Questions 14 to 16 are based on a passage about supermarkets. You now have 15 seconds to read Questions 14 to 16. What is the function of background music

A．To cover up the unpleasant noise.
B．To put people at ease.
C．To keep people moving.
D．A,B and C.

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Questions 14 to 16 are based on a passage about supermarkets. You now have 15 seconds to read Questions 14 to 16. What is the function of background music 您的浏览器不支持 audio 元素。