It was not until then that I came to know knowledge ____only

It was not until then that I came to know that knowledge ___ It was not until then that I came to know that practice (mak I came to know it was not easy to easy monwy.中的it必为that行吗? it was not until i had read your letter that i know the trut It was not until years later that I was able to fully apprec It was NOT UNTIL 还是UNTIL his mother came in that the boy tur 英语翻译It was not until I went to junior middle school that I b It was not until he came back from Africa that year that he It was not until father (come) back that I began to do ... It was not until liberation that _________ to his hometown. It was not until the result came about that he took measures It was not until the midnight ___ John came home.为什么填that而不填