While walking around the Xixi National Wetland Park, I found there were tens of thousands of people, young and old, ______ for the flower festival. Beautiful indeed!A.dressed upB.e upC.picked upD.turned up
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C解析四个选项分别表示打扮、走近、捡起和出现找到，根据题意选c，当我漫步在西溪国家湿地公园的时候，我发现那儿有成千上万的人，年轻的、老的，偶然看这个花卉节。真是太美了。