Question

________anything about the accident，he went to work as usual．

1. A.
   Not known
2. B.
   Known not
3. C.
   Knowing not
4. D.
   Not knowing

Answer 1

D
解析：
作状语的分调动词know与句子的主语he是主动关系，判断运用现在分词；其否定的构成是在分词短语前加not。