单项选择题

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

A．Inadequate medical care.
B．Continuing social unrest.
C．Lack of food, water and shelter.
D．Rapid spreading of the epidemic.
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填空题
We learn from the passage that the difference in pay between the lowest paid and the average worker in America is ______ than that in other industrialized countries.
单项选择题
A．Pollution of the environment.B．A new generation of pest killers.C．Over-killing by hunters.D．Destruction of their natural homes.
A．Pollution of the environment.
B．A new generation of pest killers.
C．Over-killing by hunters.
D．Destruction of their natural homes.
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