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1、大联考一,表示“继续保持或处于某种状态”时，应视具体情况在上述动词中进行选择：(1)表示“继续保持或处于原来的状态”时，可用remain或stay，例如：Three of them remained single.Shops should remain open till later in the evening.The door stayed closed.But the police themselves prefer to stay unarmed.(2)表示“需要设法才能保持或处于某种状态”时，应用keep，例如：She knew she must keep calm.I wish t
2、hose children would keep quiet.Although they have many difficulties,they keep happy.Paul managed to keep awake by drinking lots of strong black coffee.,(3)表示“使某人或某物保持某种状态”时，只能用及物动词keep，例如：She had kept him waiting twenty minutes on this occasion.Why do you always keep your windows closed?,1表示“继续呆在某处”
3、时，应该用不及物动词remain或stay，例如：Shall I go or stay?Stay indoors for a few days until you recover from your cold.He remained in his seat after all the other students had gone home.2表示“暂住、短期停留”时，只能用不及物动词stay。例如：He is staying at Hilton Hotel.My mother-in-law stayed with us this week when she visited us.,3表示“残
4、留、剩下”时，只能用不及物动词remain，例如：Not much of the house remained after the fire.Of the seven brothers,only four now remain;the rest are dead.,阅读A篇Ausefuldefinitionofanairpollutantisacompoundaddeddirectlyorindirectlybyhumanstotheatmosphereinsuchquantitiesastoaffecthumans,animals，vegetation，ormaterialsnegative
5、ly(特殊结构suchasto如此以致)空气污染物的一个有用定义是：一种直接或间接加入到空气里的化合物，其数量足以对人类、动物、植物或物质产生不利影响。,全文翻译:人类直接或间接使大气中一种化合物的含量增加，从而对人、动物、植物或原料等产生了不利影响，这种化合物就叫做空气污染物，这是对空气污染物的有效定义。空气污染的定义会继续改变。当第一部禁止空气污染的法律在14世纪的英格兰被制定出来时，空气污染物还仅限于那些能够被看到和闻到的复合物远少于我们今天所熟知的污染物的种类。随着技术发展、各种各样化学物质对健康的影响方面知识的增多，空气污染物的种类也在增多。在未来，即使是水蒸气在某种条件下也有可能成
6、为污染物。,有很多主要的空气污染物，如硫化物、一氧化碳、氮氧化物在自然界中均可发现。随着地球的发展，这些污染物的浓度被各种化学反应影响而发生变化。它们成为了生化循环中的组成部分。同时，将这些混合物从空气中转移到水或土壤中也是空气净化的一项方案。在全球范围内，人类活动所产生的污染物远少于自然界产生的污染物。而人类所制造的污染物通常出现在某一固定区域，比如某个城市。,在这样的一个固定区域内，人类活动产生的污染物随时可能超出自然界消除污染物的净化系统物的承载能力。结果使得空气中有害化学物质的浓度上升。一种物质要成为污染物其浓度并不需要很大；实际上，数值并不能告诉我们什么，除非我们知道这个数值代表的增
7、加量超过了该地区自然浓度多少。例如，硫氧化物在0.08ppm(百万分之0.08)时就会对健康有影响，这是它自然水平的400倍；然而一氧化碳自然水平是0.1ppm，浓度只有达到15ppm才能成为污染物。,One possible version:Im Li Hua,a senior high school student from the Peoples Republic of China and Ill graduate next June.My grandfather graduated from Harvard University 35 years ago and Im interest
8、ed in studying in Harvard Law School.Im wondering what the admission requirements for international applicants are.Although Ill have learned English for six years upon graduation,I intend to learn what kinds of tests of the English language are required for applicants.I scored well in TOEFL one year
9、 ago,but is that enough?,upon graduation：毕业后,applicant n.申请人，求职人；请求者,Whats more,would you please tell me what materials I should submit?The last question,when do you begin to accept applications and what is the deadline for applications?Looking forward to your reply!Thanks in advance.,submit vi.顺从，服从；甘受，忍受vt.使服从，使顺从；提交，呈送；法主张，建议,application n.适用，应用，运用；申请，请求，申请表格；勤勉，用功；敷用，敷用药,deadline n.最后期限；截止期限；死线；原稿截止时间vt.通过设定一时间期限来统治,
