Distinguished guests and friends,welcome to our school,the ceremony of the 50th Anniversary

题目

Distinguished guests and friends,welcome to our school,the ceremony of the 50th Anniversary
Distinguished guests and friends,welcome to our school,____ the ceremony of the 50th Anniversary this morning are our alumni (校友) from home and abroad.
A.Attend B.To attend C.Attending D.Having attended
总觉得Attending做主语怪怪的,它前面要加个people吧?

答案

attending在这是主动语态不是作为主语,句子顺序换一下就看出来了our alumni (校友) from home and abroad are attending the ceremony of the 50th Anniversary this morning.