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When very small dinosaur bones were found in a Germany mine, people thought they were from baby dinosaurs. ___1._ Martin Sander's work shows that they were probably fully __2.__ (grow) and belong to the smallest giant dinosaur species ever found.

Growth marks on dinosaur bones are similar __3.__ growth rings on trees. The rings are far apart while the animal is young and growing quickly. __4.__ get closer as growth slows. "It is _5.__ (exact) these tight ring marks that we found in the fossil bones," says Sander. So the fossils must have been from adult animals.

__6.__ was this German dinosaur so much smaller than other giant dinosaurs, which grew up to 45 metres long and weighed as much as a thousand humans?

150 million years ago, most of Germany was underwater. Scientists think that __7.__ water levels rose, there was less and less land and food available. The dinosaur _【小题8__ (force) to adapt and evolved into a smaller animal __8.__ (need) less space and food.

Since 1998, scientists have dug up more than 1,000 dinosaur fossils in the mine. It is one of the few places in the world __9._ the bones and footprints of dinosaurs have been found together.

 

1.But

2.grown

3. to

4.They

5.exactly

6.Why

7.as / when

8.was forced

9.needing

10.where

【解析】

试题分析:文章介绍了一些在德国发现的恐龙化石,以及对它们进行的研究。

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10.

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