单选题 I think it's high time we ______ measures to protect the environment.
  • A) took
  • B) will take
  • C) take
  • D) have taken


【正确答案】 A
【答案解析】[解析] 由“It is time/about time/high time...”引导的虚拟语气，谓语动词常用过去式，例如：It is time(high time) that you bought a new car．(你该买辆新车了。)故选A。