She contradicted her boss, even though she knew it was ________ for her to keep her mouth shut.
A、advisable
B、advisory
C、advised
D、advising
【正确答案】：A
【题目解析】：此句的意思是她违抗了她的老板，尽管她知道最好要闭嘴。Advisable指明智的，可取的；advisory指顾问的，劝告的；advised是advise的被动式和形容词形式，可表示被建议的；advising是advise的现在分词形式。
