The computer center,_____[A.open B.opening C.opened] last year,is very popular among the students in this school.

问题描述:

The computer center,_____[A.open B.opening C.opened] last year,is very popular among the students in this school.
并请说明原因.

选C opened
这是过去分词作定语
说全了就是 which was opened last year