A．It was as big as a large dog.

　　B．It could stand on two of its legs.

　　C．It lived 10 million to 15 million years ago.

　　D．It had a long neck in its early time.

　　答案　A　[细节理解题。根据第四段第二句“This species was about the size of a large dog.”可知，这个恐龙的大小几乎和一条大狗差不多，因此选A。根据第四段最后一句可知，该恐龙只有两条腿，故B项错误。]

　　6．Nesbitt judged the fossils in the museum depending on________.

　　A．the rocks from Lake Nyasa

　　B．the minerals in the earth

　　C．the length of the tail

　　D．the weight of the upper arm bone

　　答案　B　[细节理解题。根据第二段第一句“The scientists studied minerals from the earth where the bones were discovered and compared them with rocks from around the globe.”可知，科学家们是利用发现这些恐龙化石的土壤中的矿物质来判断的，故选B。]

　　7．Why didn't Charig publish his findings?

　　A．Because they weren't discovered by himself.

　　B．Because he was afraid of being laughed at.

　　C．Because other scientists had different ideas.

　　D．Because his teacher didn't allow him to do it.

　　答案　C　[细节理解题。根据倒数第三段第二句“Others didn't agree with him，so he never published his findings.”可知选C。]

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