81.唯利是图draw water to one's mill
82.无源之水，无本之木water without a source, and a tree without roots
83.无中生有make create something out of nothing
84.无风不起浪There are no waves without wind. There's no smoke without fire.
85.徇私枉法bend the law for the benefit of relatives or friends
86.新官上任三把火a new broom sweeps clean
