单项选择题

The passage focuses on ______.

A．dinosaur's geographical location
B．shifting views of dinosaurs
C．migration patterns of dinosaurs
D．geologic activity of Earth
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单项选择题
The discovery of a new type of ceratopsian dinosaur suggests ceratopsians ______.
A．migrated to North America around 70 -- 80 million years ago
B．arrived in Asia from North America about 90 million years ago
C．originated in Asia and later migrated to North,America
D．could have moved to Asia from North America long ago
单项选择题
The author says that trends are toward the ______.
A．growth of cities and shrinking of suburban areas
B．growth of both rural and suburban areas
C．growth of urban and suburban areas
D．growth of suburban areas and shrinking of cities
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