单项选择题

Questions 16 to 18 are based on the passage you have just heard.

A．The people of India.
B．The people of China.
C．The people of Russia.
D．The people of Thailand.

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单项选择题A．About 8,400,000.B．About 840,000.C．About 4,800,000.D．About 480,000.

单项选择题A．They impose threat to the local economy.B．They enrich local species.C．They become a local tourist attraction.D．They kill local species.

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