第1个回答 2008-09-13
Because this event needs the participation of a lot of people.
第2个回答 2008-09-13
because the activity need many people~s participating.
第3个回答 2008-09-13
Because the activity need many people's participating.本回答被提问者采纳
第4个回答 2008-09-13
because of the activity needs many men.
第5个回答 2008-09-13
你这个句子不完整 我只能按照自己的理解给你回答
As there will be many people joining this activity.