Paragraph Seven Many centuries of rain caused huge rivers to move violently through this area. Over time, these rivers cut deep into the new mountains. During the great Ice Age, millions of tons of ice cut and shaped the cooled granite to form giant rocks, known as Half Dome. 42. Various forms of water c___________ the outlook of the area.
【正确答案】：changed
【题目解析】：原文讲的是几百年前，雨水至此汇聚成河流。随着时间的流逝，这些河流冲刷着大地，形成了新的山脉。在冰川时代，数以百万吨计的冰层切割并形成冷却的花岗岩，形成巨大的岩石。所以我们总结为不同形态的水改变了这里的地貌，因此填changed。
