cause
　　n.①原因，起因the cause of the fire火災的起因; cause and effect因果 ②~(for sth.) reason 理由;緣故 There is no cause for anxiety.不必憂慮。③事業，(奮斗的)目標the cause of justice正義事業 vt.①使發生，引起Smoking can cause lung cancer.吸煙可致肺癌。

　　cautious
　　a.~(about/of sb./sth.)十分小心的，謹慎的She is cautious of telling secrets.她很謹慎, 不會泄露秘密。
　　cease[si?s]
　　n.&v.停止，終止cease to do sth./doing sth.停止做某事;without cease不停地，不斷地

　　ceiling
　　n.①天花板，頂棚rooms with high ceilings高頂棚房間 ②(價格、工資等)最高限度，最大限額The government has set a wages and prices ceiling of 10%.政府規定工資和物價提高的最高限度為10%。
　　常用短語ceiling of…最大限額
　　impose/set/put a ceiling(on sth.)規定最大限額
　　raise/lower the ceiling(on sth.)提高/降低某物的最高限度

　　celebrate
　　vt.①慶祝celebrate a victory慶祝勝利②頌揚，贊美poems that celebrate the joys of love贊美愛情的詩 vi.慶祝，過節Let’s celebrate!讓我們好好慶祝一下吧!

　　ceremony
　　n.①典禮，儀式a marriage/wedding ceremony 婚禮②禮節，禮儀The queen was crowned with due ceremony女王加冕禮儀很隆重。stand on ceremony拘于禮節

　　certificate
　　n.證(明)書，證明，執照birth/marriage/death certificate 出生/結婚/死亡證書

　　chain
　　n.①鏈，鏈條keep a dog on a chain 用鏈子把狗拴住②一連串，一系列a chain of mountains/circumstances連綿的山/情況③聯號，連鎖店a chain of supermarkets/a supermarket chain超級市場聯號;chain reaction連鎖反應④[pl.]枷鎖，鐐銬the chains of poverty 貧困的桎梏 vt.用鏈條拴住chain(up)a dog to the tree用鏈子把狗拴在樹上