单项选择题

From the second paragraph, we know that ______.

A．America is highly mechanized in agriculture
B．agriculture innovation is quite popular in U. S.
C．equipment is only available in fertilizing the plant
D．different machines are invented to do different laborious jobs

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单项选择题

In the tropical areas, ______.

A．mechanization is not yet used in agriculture
B．agriculture is accepted fastest
C．a lot of farm work is still done in the old way
D．mechanization is avoided to save primitive forest

单项选择题

More can be learned about a culture from a study of art history than general history because art history ______.

A．shows us the religious beliefs and emotions of a people in addition to political values.
B．provides us with information about the daily activities of people in the past
C．gives us an insight into the essential qualities of a time and a place
D．all of the above