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单项选择题

The author's attitude toward the communications revolution is______.

A．positive
B．critical
C．indifferent
D．tolerant
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热门试题

单项选择题Where did the Anasazi move during the Great Pueblo Period

A．To settlements on ledges of canyon walls.
B．To pueblos in the south.
C．Onto the tops of the mesas.
D．Onto the floors of the canyons.

单项选择题According to the passage, the LEAST likely reason that the Anasazi abandoned Mesa Verde was______.

A．drought
B．overpopulation
C．war
D．crop failure