单项选择题

A．Broadcasting frightened sounds of the birds to scare them away.
B．Making shooting sounds to scare the birds away.
C．Hiring special workers to drive them away.
D．Capturing them and then transporting them away.
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单项选择题
A．A professor and a student.B．A hotel manager and a tourist.C．A salesman and a customer.D．A store owner and his manager.
A．A professor and a student.
B．A hotel manager and a tourist.
C．A salesman and a customer.
D．A store owner and his manager.
单项选择题
A．To wear jackets to work.B．Not to use air-conditioners.C．To wear shirt sleeves.D．To take all measures to conserve energy.
A．To wear jackets to work.
B．Not to use air-conditioners.
C．To wear shirt sleeves.
D．To take all measures to conserve energy.
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