The college has developed an on-line system students can choose their own professors.A. wh

问题补充：

The college has developed an on-line system students can choose their own professors.

A. where

B. when

C. that

D. which

答案：

(答案→)A. where

B. when

C. that

D. which

解析：定语从句考查题。Where在从句中做状语。“大学开发了在线系统，学生们可以自选教授。”