题目内容
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
When very small dinosaur bones were found in a Germany mine people thought they were from baby dinosaurs．__1__ scientist 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 （化石）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 meters 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 __8__ （force） to adapt and evolved into a smaller animal __9__（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 __10__ the bones and footprints of dinosaurs have been found together．
1．But/ However 2．grown 3．to 4．They 5．exactly 6．Why 7．as / when
8．was forced 9．needing 10．where
