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阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Dinosaurs 1. (doubt) ruled the land and sky in their time, but there was little evidence of their presence in water until now. According to a new study published in the journal Nature, 2. international team of researchers uncovered a well-preserved skeleton (骨架) of a dinosaur’s tail in 3. is now known as the Saharan desert – a region 4. (believe) to have been an oasis (绿洲) 100 million years ago.

The remains belong to a dinosaur species named Spinosaurus aegyptiacus. Through reconstruction 5. the tail skeleton, scientists found that the tail had a fin-like (鳍状的) shape, 6. propelled(推进) the dinosaur forward. Its bones were very dense (密实的), allowing 7. to control its body position in the water. The structure of the tail bones also indicated that the animal could grow up to 15 meters long and 8. (weight) up to 20 tons.

The team made a model 9. (copy) Spinosaurus’ swimming movements, and the result supported the idea of a tail-propelled “river monster”. David Unwin, a scientist at the University of Leicester, UK, considered the discovery as “game changing” 10. it fundamentally alters (改变) our understanding of how this dinosaur species lived and hunted.

高二英语语法填空中等难度题

少年,再来一题如何?
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