The expedition reached the summit at 10:30 that morning.A:top of the mountain B:bottom of the mountain C:starting point D:site

本句意思是：探险队早上10:30到达山顶。句中summit意为“山顶”，例如：It was a warm climb to the summit.向顶峰攀登的过程很热。四个选项中：top of the mountain 意为“山顶”。bottom of the mountain意为“山脚下”。starting point意为“起点”。site意为“地点、地址”，例如：That sale precludes further development on this site.卖出以后这一地点的进一步发展受到了阻碍。只有选项A同句中画线单词含义接近。