[填空题]Today’s lecture we’ll center on the prehistoric people of Nevada Desert. Now most of these prehistoric desert people{{U}} (36) {{/U}}the countryside throughout the year. You might think that they’ re wandering aimlessly. Far from it, they actually followed the{{U}} (37) {{/U}}of carefully planned moves. Where they moved depended on where food was{{U}} (38) {{/U}}. Places where plants were ripening or fish were{{U}} (39) {{/U}}. Now often when these people moved, they carried all their{{U}} (40) {{/U}}.on their hacks. But if the journey was long, extra food and tools were sometimes stored in caves or{{U}} (41) {{/U}}rocks. One of these caves is now an exciting{{U}} (42) {{/U}}site. Beyond its small opening is a huge underground{{U}} (43) {{/U}}, Even though the cave is very large. It was certainly too dark and dusty for the travelers to{{U}} (44) {{/U}}. But it was a great place to{{U}} (45) {{/U}}And tremendous amounts of food supplies and artifacts have been found