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
What was required of a teacher in the author's hometown
A．No qualification.
B．Latin - understanding.
C．Experiences of traveling round the world.
D．The basical ability to know how to read, write and compute arithmetically.
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