the computer centre,----last year,is very popular among the studentsA. open B.opening C. having opened D. opened A可以选吗?which was open(形容词)省略which was

问题描述:

the computer centre,----last year,is very popular among the students
A. open B.opening C. having opened D. opened A可以选吗?which was open(形容词)省略which was