(2013·四川，8) which university to attend，the girl asked her teacher for advice.
A. Not knowing
B. Knowing not
C. Not known
D. Known not
网友回答
(答案→)A. Not knowing
B. Knowing not
C. Not known
D. Known not
解析：考查非谓语动词。主语the girl与非谓语动词know之间为主动关系，故用现在分词；且非谓语动词的否定式应在其前加否定词。据此可知答案为A。此处分词Not knowing在句中作原因状语。