单项选择题

A．The animals overfertilize the soil.
B．Dead plant roots can’t hold the soil together.
C．The wrong types of plants are left standing.
D．There is a buildup of plant and animal matter.
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单项选择题
A．The importance of anthropology to modern society.B．A good source of information about a society.C．Attitudes toward culture in the 1940’s.D．The relationship between anthropology and the military.
A．The importance of anthropology to modern society.
B．A good source of information about a society.
C．Attitudes toward culture in the 1940’s.
D．The relationship between anthropology and the military.
单项选择题
A．He’s teaching a computer class.B．He has decided to earn double degree.C．He has decided to change his field of study.D．He’s taking a class to update his skill.
A．He’s teaching a computer class.
B．He has decided to earn double degree.
C．He has decided to change his field of study.
D．He’s taking a class to update his skill.
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