1.(a)proof 证明/证据=复数拼写相同:You must have proof of residence in Hongkong. (b)proof 校样=proofs:Dear Author,.Here are the proofs of your article.I'm correcting the proofs of the Chinese edition now. 2.chief 长官:复数 chiefs (同beliefs,briefs); chef =厨司 chefs 3.mouth=mouths 4.sheet = 复数sheets 5.shelf = shelves