单项选择题
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A. Hospital employees only. B. Many City Hall officials.
C. Many Packer Hall residents. D. The engineering students only.
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单项选择题
A. They like music. B. They want to say something. C. They sing for enjoyment. D. They are in a good temper.
A. They like music. B. They want to say something.
C. They sing for enjoyment. D. They are in a good temper.
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单项选择题
B
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