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1、Unit 4 Astronomy：the science of the stars 天文学：恒星科学,.重要单词聚焦 1n系统，体系，制度 2 n. 学说；理论 3 pron.，n.& adj. (英)万亿；(美)十亿 4 adj. 猛烈的；激烈的；强暴的 5 n. 大气层；气氛 6 prep. 不同；不像 7 adj. 有害的 8vi.& vt. 乘；增加,system,theory,billion,violent,atmosphere,unlike,harmful,multiply,9 vi. 存在；生存 10 adv. 因此；于是 11 n. 谜；难题 vt.& vi. (使)迷惑；(使
2、)为难 12n. 万有引力；重力 13 adj. 温和的；文雅的 14 n. 气候 15n. 物理学家 16 vi.& vt. 碰撞；坠落 17 n& vt. 拉(力)；拖；牵引力 18n. 质量；团；块；大量；(复)群众,exist,thus,puzzle,gravity,gentle,climate,physicist,crash,pull,mass,.重点短语扫描 1prevent. 阻止 2 eggs 下蛋 3ones turn 轮到某人；接着 4get the hang 熟悉；掌握；理解 5watch 密切注视；当心；提防 6depend 依靠 7 time 及时，终于 8give
3、产生；分娩 9cheer 感到高兴；感到振奋 10now 既然,from,lay,in,of,out,on,in,Birth to,up,that,11break 突发；爆发,out,.课文原句突破 1What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 信息提取what it was to become是what引导的主语从句，what在从句中作become的宾语。 例句仿写使大家惊奇的是他竟没有参加会议
4、。 _ _ _ _ _he didnt come to the meeting. 【答案】What surprised everybody is that,2The earth became so violent that it was not clear whether the shape would last or not. 信息提取whether.(or not)引导的从句还可充当宾语、表语、同位语等。 例句仿写他是否能成功地通过驾驶考试还不确定。 It is uncertain_ _ _ _passing the driving test_ _. 【答案】whether hell su
5、cceed in；or not,3This produced a chain reaction，which made it possible for life to develop. 信息提取which引导非限制性定语从句，指代主句整个概念，也可代指单个先行词。 例句仿写杰克开车太快，这是危险的。 Jack drove too fast，_ _ _. 【答案】which was dangerous,4We watched，amazed as fire broke out on the outside of the spaceship as the earths gravity increase
6、d. 信息提取amazed是形容词化的过去分词，在此处作状语用。 例句仿写他躺在床上，醒着。 He_ _ _ _，_. 【答案】lay in the bed；awake,atmosphere n大气，空气；环境，气氛 Everyone could feel the tense atmosphere at the meeting. 大家都能感受到会场上的紧张气氛。 He is fond of the atmosphere of peace and calm in the country.,他喜欢乡间的和平宁静的气氛。 Ever since their quarrel，there has been
7、 an unpleasant atmosphere in the office. 自从他们发生口角以来，办公室里总有一种不愉快的气氛。,1(2008年湖北卷)The top leaders of the two countries are holding talks in a friendly_. AatmosphereBstate Csituation Dphenomenon 【解析】句意为：两国高层领导人之间的会谈在友好的气氛中举行。atmosphere气氛；state状态；situation处境；phenomenon现象。由句意可知A项正确。 【答案】A,mass n. (1)C 块；团
8、；堆 Before the rain，the sky was a mass of clouds. 下雨前，天空有一团云。 A mass of letters came from all over the country. 一大堆信件来自全国各地。,(2)(pl.)群众，集团 from the masses to the masses从群众中来，到群众中去 The masses have boundless creative power. 人民群众有无限的创造力。 (3)a mass of/masses of大量的，许多的，后跟可数名词复数或不可数名词。 She has a mass of th
9、ings to do.她有一大堆的事情要做。,(4)in a mass大量地；大批地 Sports fans came to the stadium in a mass before the game. 大批的运动爱好者在赛前就来到了体育馆。,2The young dancers looked so beautiful in their new clothes that we took_pictures of them. Amany of Bmasses of Cthe number of Da large amount of,【解析】本题考查短语的用法区别。题意是“这些年轻的舞蹈演员穿着漂亮
10、的衣服，显得那么迷人，我们拍了她们的许多照片”。many of许多，其后接复数名词，且名词前要有these，those，the，their等限定词；masses of许多，大量的，既可修饰可数名词，又可修饰不可数名词；the number of意为“的数量”，表“许多，大量的”之意时，要用a number of；a large amount of许多；大量的，用以修饰不可数名词。由题意可知选B。 【答案】B,in time及时；终于，总有一天 You will succeed in time because you are always working hard. 你迟早会成功的，因为你一直在
11、努力工作。 The doctor came in time to save her life. 医生及时赶到救了她的命。,on time准时；按时 in no time立即；马上 at a time一次；每次 at one time曾经；一度 at times有时 ahead of time提前 take ones time别着急，慢慢来 Dont recite all together；one at a time.不要一起背诵，一次一个。 The boss ordered us to finish our task ahead of time. 老板命令我们提前完成任务。,3_，I lost
12、 heart in English learning，but my teacher often said to me，“keep on studying hard，and youll succeed_.” AAt a time；in time BAt a time；on time CAt one time；in time DAt one time；on time,【解析】考查由time构成的固定搭配的用法。句意为：曾一度，我对英语学习失去信心，但我老师常对我说：“坚持不懈的努力，最终会铸就你的成功。” at a time每次；at one time曾经，一度；相当于once；in time及时
13、，迟早；当“迟早”时相当于sooner or later；on time按时，准时。由句意应选C。 【答案】C,4(2009年江西景德镇模拟)Does he often ask you for help? Oh，no，only_. Aall the time Bat one time Cat a time Dat times 【解析】all the time一直；at one time曾经；at a time一次；at times有时。 【答案】D,5I am afraid I cant return the book to you before Friday. _. ADont be afr
14、aid BBe careful CNot at all DTake your time,【解析】句意为：恐怕我不能在星期五之前把这本书还给你。慢慢来，不着急。Dont be afraid别害怕；Be careful小心，当心；Not at all一点也不；Take your timeto use as much time as you need without hurrying不用急，慢慢来。根据题意只有D项符合句意。 【答案】D,in ones turn轮到某人；接着 They all spoke at the meeting，each in his turn. 他们每个人都在会上轮流发言了
15、。,in turn依次；轮流；反之，反过来 by turns轮流；交替地 take turns to do sth.轮流做某事 it is ones turn to do sth.轮到某人做某事 She asked the same question of everyone in turn. 她依次向每一个人问同样的问题。 The shop assistants had to have their days off by turns. 店员要轮流休息。,It is your turn to read the text.该轮到你读课文了。 The children were taking tur
16、ns on the slides in the playground. 孩子们在操场上轮流滑滑梯。,6(2007年湖北卷)People try to avoid public transportation delays by using their own cars，and this_creates further problems. Ain short Bin case Cin doubt Din turn 【解析】本题考查短语意思辨析。in short意为“总之，简言之”；in case意为“假使，免得，以防万一”；in doubt意为“感到怀疑，被怀疑的”；in turn意为“反过来，依次，轮流”。根据句意
