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

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热门试题

单项选择题

The author is primarily concerned with describing ______.

A．research into tropical-forest biology on Barco Colorado Island
B．how the whole ecosystems can depend on the survival of a single species
C．the life cycle Of the fig wasp
D．the importance of forests to the human race

单项选择题

What does the last paragraph tell us

A．Andy Williams' parents’divorce has some negative effects on him.
B．Andy Williams was rather popular because he used to be quite friendly.
C．Anti-bullying policies are adopted by all schools in Colorado.
D．Silence is strongly banned in schools.