核心词汇推荐:
  circumstance n. 环境;境况(circumstances – environment - setting – surrounding 环境, 情况 ); (in [under] the circumstances/在这种情况下);
  citizen n. 市民;公民;
  city n. 城市,都市;
  civil adj. 全民的;市民的;公民的 ;
  claim n. (根据权利提出)要求;主张v. (根据权利)要求,主张(make a claim for/对(赔偿等)提出要求……);
  class n. 班级;阶级;种类;(一节)课(in class/在上课中);
  classical adj. 古典的;古典文学的;人文科学的(classical music/古典音乐; classical school/古典(经济) 学派);
  classify (B) v. 把…分类
  classmate n. 同学;同班同学;
  classroom n. 教室;
  clean adj. 清洁的,干净的v. 打扫,清扫;
  clear adj. 清楚的,清晰的(clear – apparent清楚的,清晰的);空旷的; v. 扫除,清除;晴(clear away/清除, 消失);
  clever adj. 机灵的,聪明的;
  climate n. 气候(political climate/政治风气; a mild climate/温和的气候);
  climb v. 攀登;爬;爬高(climb up[down] the hill/上[下]山);
  clinic n. 门诊部;临床;
  clock n. (时)钟(around the clock/日以继夜;整日整夜 (= round the clock));
  close v. 关,关闭;结束 n. 结束 adj. 近的,紧密的;精密的;封闭的;亲密的(close down/关闭;封闭;close season/禁猎期; close to/与……接近;与……靠近;将近;在……附近);
  cloth n. 布;织物;衣料(cut one’s coat according to one’s cloth/量布裁衣,量入为出);
  clothes n. 衣服;[总称]被褥;各种衣服(put on [take off] one’s clothes/穿[脱]衣服);
  clothing n. [集合词]衣服;
  cloud n. 云;烟云;
  cloudy adj. 多云的,阴天的;模糊的;
  club n. 俱乐部;
  clue (B)n. 提示,线索(clue – hint 提示,线索)
  clumsy (A) adj. 笨拙的, 手脚不灵活的 (clumsy – awkward 笨拙的)
  coal (A)n. 煤;煤炭;
  coarse (B) adj. 粗的;粗糙的(coarse – rough粗糙的);未加工的(coarse– crude 未加工的);(表面)不光滑的;
  coast n. 海岸(along the coast/沿海岸off the coast/在海面上);
  coat: n. 上衣, (油漆等) 涂层 ; v. 给…穿上外套, 给…上涂
  coffee: n. 咖啡
  coin: n. 硬币
  cold adj. 冷,寒,冻;冰凉的; 冷静的; n. 感冒,着凉,伤风 , 寒冷; (have(catch/get/ come down with) a cold 患感冒)

  往年考题回顾:
  变形于(CET-4, 1999,6)
  We have been told under no ___ may we have the telephone in the office for personal affairs.
  A. circumstances B. environment C. setting D. surroundings
  答案A. “under no circumstances + 倒装结构” : 在任何情况下决不…