1、Unit 4 Astronomy:the science of the stars温故知新（课前复习类训练）Words recycling and grammar reviewing（旧词循环和语法复习）.Write down the proper English expressions of the following Chinese words.（写出下列中文的英语表达。 ）1.打赌 _2.仆人，侍者 _3.偶然地 _4.旅费 _5.外表，外貌 _6.傻的，愚蠢的 _7.甜点 _8.尖叫 _9.承担，担负 _10.幽默 _答案：.1.make a bet 2.servant 3.by ac
2、cident 4.passage 5.appearance 6.silly 7.dessert 8.scream 9.shoulder 10.humour.Translate the following sentences into English.（把下列句子翻译成中文。 ）1.看上去，他像是生气似的。It seems _.2.信上说，他们将在星期天到达。The letter says _.3.我们认为，他对每个人都说了谎是错的。We think _.4.我们相信他还没有做完他的工作。We dont believe _.5.问题是科学家怎样才能保持和海下潜水员的联系。The problem
3、is _.答案：.1.he looks as if he were angry2.that they are arriving on Sunday3.it wrong that he told a lie to everyone4.he had finished his work5.how scientists can keep in touch with the divers under the sea有备无患（课前预习类训练）Preparation for new lessons(新课预习).Choose the proper item which has the closest mean
4、ing to the word given.（选择在词义上与所给单词最接近的选项。 ）1.violent _A.gentleB.very greatC.acting with great damaging force 答案：C2.astronomy _A.the scientific study of the sun,moon,stars and other heavenly bodiesB.the scientific study of living things C.the science of treating and understanding diseases 答案：A3.teles
5、cope _A.a method of sending messages along wire by electric signalsB.a tube-like scientific instrument used for seeing distant objects C.a method of sending sounds over long distances by electrical means答案：B4.float _A.stay at the top of liquid B.(of liquid) run or spread smoothly C.move through the
6、air by means of wings or machines 答案：A5.disappoint _A.fail to fulfill the hopes ofB.get happiness fromC.make sb.angry答案：A.Complete the sentence with a suitable word.（用合适的单词填空。 ）1.Matters have three states:s ,gas and liquid.2.People need o to live.3.The table had a shiny s ,but underneath it was dull
7、 and rough.4.The Roman Empire e for several centuries.5.Nowadays many d areas have been established in China.答案：1.solid 2.oxygen 3.surface 4.existed 5.development.Give the Chinese meanings of the following phrases.（把下列短语译成中文。 ）1.in time 7.cool down2.because of 8.as well as3.for the first time 9.all
8、over4.now that 10.break out5.cheer up 11.depend on 6.prevent .from. 12.get the hang of答案：1.及时 2.因为 3.第一次 4.既然5. 使高兴 6.阻止 7.冷静下来 8.同样 9.全部 10.爆发 11.依靠12. 掌握.Go through the texts,and find out the English expressions of the following Chinese sentences.(阅读课文，从课文中找到下列中文句子的英文表达。)1.随着“轰隆”一声巨响，地球就成了一个云团，充满了
9、具有能量的尘埃。2.它的巨大的爆炸喷出了烈火与岩石，最终产生了水蒸气、二氧化碳、氮和其他多种气体，从而形成了地球的大气层。3.它使地球曾经存在于大气层中的有害气体溶解在海洋里。4.这促进了早期贝类动物和各种鱼类的生长发育。5.我立刻感到很高兴，由于失重我在太空舱中飘来飘去，我望着身后的地球越来越小，而前方的月球越来越大。6.我们惊奇地看着，随着地球引力的增加，宇宙飞船的外层燃烧起火。答案：1.After the “Big Bang”,the earth was just a cloud of energetic dust2.It exploded loudly with fire and ro
10、ck,which were in time to produce the water vapour, carbon, dioxide, oxygen,nitrogen and other gases,which were to make the earths atmosphere3.It allowed the earth to dissolve harmful gases,which had become part of the earths atmosphere,into the oceans and seas4.This encouraged the development of early shellfish and all sorts of fish5.I cheered up immediately and foated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger6.We watched amazed as fire broke out on the outside of the spaceship as the earths gravity increased
