单项选择题

The passage focuses on ______.

A．dincosaur'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
Witmer's research leads people to believe ______.
A．Tyrannosaurus Rex had lips and Triceratops had cheeks
B．dinosaurs might have looked like mammals such as sheep
C．dinosaurs might not have looked like what we thought
D．dinosaurs must have looked like birds or crocodiles
单项选择题
The discovery of dinosaur fossil sites in Bolivia is exciting because of the following reasons EXCEPT ______.
A．they are found in continent other than Asia and North Continent
B．the largest dinosaurs in the world are found in this discovery
C．there are some unknown species of dinosaurs found this time
D．the dinosaurs were believed to be some of the last ones on earth
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