老板一进门，他就开始阿谀奉承、极尽谄媚之能事。

As soon as the boss entered, he started ___boot-licking and flattering excessively.

他通过对自己错误的自嘲式评论试图给老板留下好印象。

He tried to impress his boss with some ___self-deprecating comments about his own mistakes.