【正确答案】 1、the web site    

【答案解析】[详细解答] 本文的第十三段中提到：“Second Life's basic membership is free after downloading software from the Web site，http：//www．secondlife．com”以及“The site，owned by privately held Linden Lab of San Francisco，debuted Second Life in 2003 and makes money by charging a monthly fee to purchase virtual land and build a house or other structure on it”。这表明“Second Life”是一个网站。