阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。
A piece of stone8．(find) on a Dutch beach suggests that our extinct human relatives, known as Neanderthals, were cleverer than previously thought. The Neanderthals9．（live）alongside human ancestors in Europe for tens of thousands of years, before dying out about 40, 000 years ago. They were much stronger than modern humans, but it's long been assumed that human ancestors were10．（smart）than the Neanderthals. However, the stone tool made by Neanderthals suggests otherwise.
8．found
9．lived/had lived/had been living
10．smarter
【分析】
本文是一篇说明文。主要介绍了在荷兰海滩上发现的一块石头表明已经灭绝的人类亲戚尼安德特人比我们之前认为的更聪明。
8．考查非谓语动词。句意：在荷兰海滩上发现的一块石头表明，我们已经灭绝的人类亲戚尼安德特人比我们之前认为的更聪明。句子的谓语为suggests，设空处在句中作非谓语和逻辑主语之间是逻辑的被动关系。故答案为found。
9．考查动词的时态和语态。句意：尼安德特人与人类祖先一起在欧洲生活了数万年，直到大约4万年前灭绝。设空处在句中作谓语，结合句意，此处是指在灭绝之前一直生活了数万年。设空处的动作发生在灭绝之前，结合时间状语for tens of thousands of years。故应用过去完成时态或者过去完成进行时态；又因动作发生在过去，强调过去发生的动作，也可用一般过去时。故答案为lived/had lived/had been living。
10．考查形容词的比较级。句意：但长期以来，人们一直认为人类祖先比尼安德特人更聪明。设空处前为were设空处应用形容词，设空处后的than表示比较，应用比较级。故答案为than。
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