单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Why species don’t avoid extinction by adapting.
B．Why species become extinct at the rate they do.
C．Why humans aren’t extinct.
D．How many species aren’t extinct.
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单项选择题
A．Her car is being repaired.B．Parking is difficult in the city.C．The cost of fuel has increased.D．She wants to help reduce pollution.
A．Her car is being repaired.
B．Parking is difficult in the city.
C．The cost of fuel has increased.
D．She wants to help reduce pollution.
单项选择题
A．The effect of ordinary aspects of life on anthropology.B．A good source of information about a society.C．Attitudes toward culture in the 1940’s.D．The relationship between anthropology and military.
A．The effect of ordinary aspects of life on anthropology.
B．A good source of information about a society.
C．Attitudes toward culture in the 1940’s.
D．The relationship between anthropology and military.
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