【choose】to decide between two or more.
* You may choose one meat and three vegetables from the lunch list. 你可以在午餐清单中挑选一份肉和三份蔬菜。
【circle】a closed shape that has all its points equally distant from the center, like an O.
* The settlers put their wagons in a circle to defend against the attack. 移民们将彼此的四轮马车围成一个圆圈来抵抗攻击。 defend against：保护…不受…，防御
【citizen】a person who is a member of a country by birth or by law.
* Every citizen is expected to vote. 希望每个公民投票。
【city】any important large town.
* I lived in a small town as a child, but now I live in a city. 我小时候居住在一个小镇，但是现在我居住在一座城市。
【civilian】not military.
* Many civilians were killed in the attack on the town. 在那次袭击城中，许多平民惨遭杀害。
【civil rights】the political, economic and social rights given equally to all people of a nation.
* The law protects the civil rights of all citizens. 法律保护所有公民的公民权利。
【claim】to say something as a fact.
* He claimed that his opponent lied about his activities as a student leader. 他声称他的对手对自己作为学生领袖的行为撒谎。
【clash】(1) a battle; (2) to fight or oppose.
* Ten protesters were injured in the clash with police. (1) 10名抗议者在与警察发生的冲突过程中受伤。
clash with：与(某人或某事)抵触，与(其他事)在时间上有冲突，与(某物)不相配
* Angry farmers blocked roads and clashed with soldiers. (2) 愤怒的农民阻塞道路并与士兵冲突。
clash with：与(某人或某事)抵触，与(其他事)在时间上有冲突，与(某物)不相配
【clean】(1) to make pure; (2) free from dirt or harmful substances.
* Please clean your room. (1) 请打扫你的房间。
* Too many people around the world do not have clean water to drink. (2) 全世界太多人没有干净的水喝。
【clear】(1) easy to see or see through; (2) easily understood.
* Clear water is not always safe to drink. (1) 清澈的水喝起来并不总是安全的。 not always：不一定，不总是
* He won the debate because his arguments were clear to almost everyone. (2) 他赢得辩论，因为他的辩论几乎每个人都清楚。
【clergy】a body of officials within a religious organization.
* Many in the clergy supported the reforms proposed by the rebels. 许多神职人员支持叛乱者们提出的改革。
【climate】the normal weather conditions of a place.
* Many retired people like to spend the winter in the warm climate of Florida. 很多退休了的人喜欢在佛罗里达的温暖气候中度过冬天。
【climb】to go up or down something by using the feet and sometimes the hands.
* The firemen climbed ladders to rescue people living above the ground floor. 消防员们爬上梯子抢救一楼以上活着的人们。
【clock】a device that measures and shows time.
* I was late for work because my clock stopped. 我上班迟到，因为我的钟停止了。 be late for：迟到
【close】(1) to make something not open; (2) near to.
* Please close the window before you come to bed. (1) 上床睡觉前请把窗关上。
* Stay close to me in this big crowd. (2) 这里人群众多，靠我近点。 close to：离…近，与…关系密切
【cloth】a material made from plants, chemicals, animal hair and other substances.
* I feel cooler in summer when I wear shirts made of cotton cloth. 夏季，当我穿棉布衬衫时会感到更凉爽。
【clothes】what people wear. Be sure to bring enough clothes for two weeks. 一定要带够两周用的衣服。
【cloud】a mass of fog high in the sky.
* Clouds like those usually mean rain will come soon. 那样的云通常意味着雨很快要到来。
【coal】a solid black substance used as fuel.
* Much of our electricity is produced by plants that burn coal as fuel. 我们大部分的电力是发电厂用煤作燃料生产的。
【coalition】forces, groups or nations joined together.
* The country is led by a coalition government of three parties. 国家由一个三党联合的政府领导。
【coast】land on the edge of the ocean.
* The storm caused high waves and flooding along much of the Atlantic coast. 暴风卷起巨浪并淹过了大部分的大西洋海岸。
【coffee】a drink made from the plant of the same name.
* People in Seattle drink lots of coffee. 在西雅图的人们喝许多咖啡。
【cold】(1) not warm; (2) having or feeling great coolness or a low temperature.
* The water is too cold for swimming. (1) 这个水用来游泳太冷了。
* This has been a cold winter, with much ice and snow. (2) 这是一个多冰雪的寒冬。
【collect】(1) to bring or gather together in one place; (2) to demand and receive.
* The driver collected the children after school and brought them home. (1) 放学后，司机接那些孩子们并带他们回家。
* Your employer collects taxes for the government every time you are paid. (2) 你的雇主在每次付报酬给你时都要为政府征税。
【college】a small university.
* Have you decided where you will attend college? 你决定在上哪所大学了吗？
【colony】land controlled by another country or government.
* Hong Kong is no longer a British colony. 香港不再是一块英国殖民地。
【color】the different effects of light on the eye, making blue, red, brown, black, yellow and others.
* I love the bright colors of the autumn leaves. 我喜欢秋天树叶的鲜艳的颜色。
【combine】to mix or bring together.
* The new organization combines radio and television broadcasting. 新组织组合无线广播和电视广播。
【come】(1) to move toward; (2) to arrive.
* Jan is coming home for the holidays. (1) 简打算回家度假。
* The two sides came together on a settlement after long and detailed negotiations. (2) 经过持久详细的谈判后双方达成了和解方案。
【command】(1) to order; (2) to have power over something.
* The general commanded the army to move against the enemy. (1) 将军命令军队向着敌人开动。 move against：向着……开进
* The President commands all the military forces. (2) 总统指挥所有的军队。
【comment】(1) to say something about; (2) to express an opinion about something.
* Mr. President, please comment about the increased number of terrorist attacks. (1) 总统先生，请评论有关恐怖袭击的数目增加的现象。
* He commented about the writers who criticized his new book. (2) 他对那些批评他的新书的作家发表意见。
【committee】a group of people given special work.
* The committee met three times to decide who should get the special award. 委员会开会3次，决定谁应该得到特别奖。
【common】(1) usual; (2) same for all.
* He liked to call himself a common man. (1) 他喜欢把他自己叫做一个普通人。
* The allies united for a common purpose: to win the war. (2) 那些同盟者的结合是为了共同目：赢得战争。
【communicate】(1) to tell; (2) to give or exchange information.
* The chairman communicated that he was not happy with the proposed agreement. (1) 主席表示他不喜欢被提议的协议。
* Because we communicate well, we understand each other's situation. (2) 因为我们交流得好，所以我们理解彼此的情况。
【community】a group of people living together in one place or area.
* Our community includes people from many other countries. 我们的社区包括来自很多其他国家的人。
【company】a business organized for trade, industrial or other purposes.
* My friend started an Internet company to repair and sell old musical instruments. 我的朋友开始经营一个因特网公司，修理和出售老乐器。
【compare】to examine what is different or similar.
* We urge you to compare the price and quality of our products with those of our competitors. 我们力劝你们将我们产品的价格和质量与我们竞争对手的产品价格和质量对比一下。
【compete】to try to do as well as, or better than, another or others.
* The Internet lets companies compete almost anywhere in the world. 因特网让公司几乎在世界上任何地方竞争。
【complete】(1) having all parts; (2) ended or finished.
* I have a complete set of recordings by the Beatles. (1) 我有一整套披头士乐队的唱片。 complete set of：整套的
* We completed all the work yesterday. (2) 昨天我们完成所有的工作。
【complex】(1) of or having many parts that are difficult to understand; (2) not simple.
* The trade agreement is the result of some very complex negotiations. (1) 贸易协定是一些非常复杂谈判的结果。
* It may seem simple, but it is really complex. (2) 它看起来是简单，但是它真的复杂。
【compromise】the settlement of an argument where each side agrees to accept less than first demanded.
* Compromise may not be possible in that dispute. 这场辩论中，妥协是不可能的。
【computer】an electronic machine for storing and organizing information, and for communicating with others.
* Computers are a necessary tool for managing a business. 计算机是管理业务的一件必要工具。
【concern】(1) interest, worry; (2) to fear.
* The president expressed concern about the continuing violence. (1) 总统表示对持续不断的暴力的关注。
* He said he is especially concerned that the fighting will spread to other countries. (2) 他说他特别担心战斗会向其它国家扩展。 spread to：蔓延到
【condemn】to say a person or action is wrong or bad.
* The senators condemned the man for refusing to answer their questions. 那些参议员责备那个人拒绝回答他们的问题。 condemn for：因…而指责…
【condition】(1) something declared necessary to complete an agreement; (2) a person's health.
* The conditions for his resignation included a ten million dollar payment. (1) 他的辞职的那些条件包括1000万美元报酬。
* The doctor said the examination showed that Gary was in excellent condition. (2) 医生说检查显示加里（加里：姓氏，男子名）非常健康。
【conference】a meeting.
* I seemed to spend my days going from one conference to another. 我的日子似乎在从一个会议到另一个会议中度过。
【confirm】(1) to approve; (2) to say that something is true.
* The senate confirmed the appointment of the new Agriculture Secretary. (1) 参议院确认新农业部长的任命。
* The candidate confirmed the report that he was ending his campaign. (2) 候选人确认有关他要结束竞选活动的报道。
【conflict】(1) a fight; (2) a battle, especially a long one.
* We had a conflict about politics. (1) 我们关于政治有一次冲突。
* The long conflict finally ended with a ceasefire, not a peace treaty. (2) 长时间的冲突最后以一次停火协议结束，并非一项和平条约。
【congratulate】to praise a person or to express pleasure for success or good luck.
* I congratulate you for getting the highest score on the history test. 我祝贺你的历史测试得最高分。