单项选择题
A.observation... convenient B.analyses ... fashionable C.second-guessing ... costly D.footwork ... organized E.solutions... abstruse
A.imprudently... curb B.insolently ... insinuate C.intelligently... observe D.precariously ... expose E. insensitively ... brook
A.ennobling B.intriguing C.beneficial D.nebulous E. tangential