The computer centre, (opened) last year, is very popular among the students in this school
【解析】
?电脑中心是由经营者开办的,即 the proprietor opened the computer centre last year,
?变成被动语态：the computer centre was opened last year (by the e proprietor)
?省略与句子主语一致的 the computer centre 和表示被动的助动词 was 就成为 opened last yea