The result of the entrance exams was not made known to the pulic until last Thursday.为什么填 known

题目

The result of the entrance exams was not made known to the pulic until last Thursday.为什么填 known
详细点
而不用to know

答案

整句翻译：考试结果直到上周四才被公布于众.(没有known的时候应该也能够理解这句话的大概意思）换个角度理解,即考试结果直到上周四才被公众知道.
被动态：The result of the entrance exams be not made .to the public 跟中文的语序是反的,可以按顺序考虑
即 xxx do not make the public .the result of the entrance xxx没有让公众( )考试结果,可以想到是（知道）考试结果
make sth known to sb 此处known 为形容词而不是know的过去分词 意为：知道的