The original purpose of feather was______.
A. to help dinosaurs fly
B. to keep dinosaurs warm
C. to distract predators
D. a mystery
查看答案
We learn from the beginning of the passage that______.
A. scientists are split as to whether birds descended from dinosaurs
B. the bone similarities between birds and dinosaurs are a coincidence
C. fossils have proven that birds evolved from dinosaurs
D. the idea that birds are connected with dinosaurs has always been taken seriously
In the view of Kevin Padian, the feathers on those dinosaurs______.
A. were of no practical value
B. were useful for flight
C. could protect dinosaurs from their natural enemy
D. were good for insulation
Speaking of the recently-announced fossil of a juvenile dinosaur, the author implies that
A. it shows vividly how dinosaur flies
B. it brings new mystery to paleontologists
C. it further proves the link between birds and dinosaurs
D. it solves the puzzle of birds" evolution
When______at the door, she was given a warm welcome.
A. appear
B. appeared
C. appearing
D. appears
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