He became more outgoing than before ____ meeting new people in the club.

问题描述:

He became more outgoing than before ____ meeting new people in the club.
空格处应填什么单词,

when
这是连词+ 分词 结构,在此句中做时间状语
等于when he met new people in the club
翻译:在俱乐部会见陌生人时,他比以前更友好,开朗了.