15. Only when I began to do it ____ that I had made a mistake. A I realized B I had realized

問題詳情

15. Only when I began to do it ____ that I had made a mistake. A I realized B I had realized C did I realize D would I realize

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)