The scientists don’t think the dinosaurs were dragged into the cave by a flesh­eating animal.One reason is that the skeletons were missing very few bones.Also，there were no bite marks on the bones.Among other bone­based evidence，the shape of the dinosaurs’ forearms shows where strong digging muscles would have been.And their wide hips suggest that the creature could have supported itself while digging.

　　The new fossils(化石) are the best evidence yet that some dinosaurs dug caves and lived in them，the researchers say.The young skeletons were nearly two­third the size of an adult.That supports a theory that some dinosaurs took care of their young.The finding also suggests that digging dinosaurs could have been more common than scientists previously thought.

　　The researchers have named the new species Orycto­dromeus cubicularis，which means “digging runner of the den”．

　　1．From the passage，we learn the sandstone

　　.

　　A．was found through the hard work of scientists

　　B．was found in northwestern Montana

　　C．was 95 million years old

　　D．contained clues about a new species of dinosaur

　　答案　D

　　解析　细节理解题。根据文章第三段的内容可知，在沙石内部发现了恐龙新物种的骨骼，故选D。

　　2．The underlined word “revealed” in Paragraph 3 means “

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