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{{B}}Text{{/B}} Men have traveled ever since they flint appeared on earth. In primitive times they did not travel for pleasure but to{{U}} (26) {{/U}}new places where their herds could feed, or to escape from{{U}} (27) {{/U}}neighbors, or to find more{{U}} (28) {{/U}}climates. They traveled on foot. Their{{U}} (29) {{/U}}were long, tiring and often dangerous. They protected themselves with simple{{U}} (30) {{/U}}such as wooden sticks or stone clubs, and by lighting fires at night and,{{U}} (31) {{/U}}all, by keeping together. Being intelligent and creative, they soon{{U}} (32) {{/U}}easier ways of traveling. They{{U}} (33) {{/U}}on the backs of their domestic animals; they hollowed out tree{{U}} (34) {{/U}}and, by using bits of wood as paddles, were able to travel A. discovered B. recovered C. created D. made 我来回答: 提交
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