摘要：根据课文内容完成下面语法填空.注意单词拼写和词语用法: A group of students came to Zhoukoudian for a 1 . An archaeologist showed them around. He told them it was here that they found 2 of the earliest people who lived in this 3 of the world, and it was reasonable to 4 they had lived in these caves, regardless of the cold. We had discovered 5 in the center of the bones of tigers and bears. It seemed that they might have used 6 stone tools to cut 7 the animal and 8 their skin to sew the pieces together. Maybe there was 9 between early people. They didn’t 10 their own crops, but picked fruit and killed animals. (答案: 1.visit; 2.evidence; 3.part; 4.assume; 5.fireplaces; 6. sharpened; 7.up; 8.remove; 9.trade; 10.grow)

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