()arriving at the meeting room,Tina discovered that she had left the sample
问题描述：
()arriving at the meeting room,Tina discovered that she had left the sample
答
在到达会议室时蒂娜（人名）找到了她留下的样品是个选择题A ByB ThroughC OnD In选on ,on arriving 意思是一到达就怎么样