单选题It was the third tim

问题补充：

单选题ItwasthethirdtimethatI_______ofthechangesofthetimetable.A.had informedB.has informedC.had been informedD.has been informed

答案：

C解析句型考查题。It was +序数词+that sb had done sth “这是某人第几次做某事”