A arriving,to find B coming to,discovering that C on arrivingat, finding out D hurrying to,to have found out
答案a
如果选A 应该加上at, arrive 后面必须加介词,A arriving at,to find赶到达火车站,我们休息了一会儿,却发现火车已经开走
嗯,那怎么不选匆忙那个