Judging from what has happened here, it’s high time that we effective measures to prevent this.
A. could take
B. must take
C. should take
D. would take
网友回答
A. could take
B. must take
(答案→)C. should take
D. would take
解析：考查虚拟语气。it’s high time that + did/should + v原形，表示“是该某人做某事的时候了”，故选C。