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1、/Unit 4 Astronomy the science of the stars Warming Up & Reading.用所给词的适当形式填空1A _ (violence) tornado hit a village in southwest of China the other day.2As we all know, a bad eating habit is _ (harm) to ones health.3Do you believe that there is the _ (exist) of ghosts?4He often says that he doesnt beli
2、eve in any _ (religious)and only believes in himself.5_ (like) what he said, he didnt carry out his promise.6There is a _ expression on his face because of the _ problem. (puzzle)7To us the whole _ (global)is like a family.8If a person or thing is _ (chain) to something, they are fastened to it with
3、 a chain.9The customers have _ (multiply) their demands on this kind of products in the past two years.10We need many powerful _ (system)to keep a stable society running smoothly (顺利地)答案：1.violent2.harmful3.existence4.religion5.Unlike6.puzzled; puzzling7.globe8.chained9.multiplied10.systems.用适当的介词或副
4、词填空1We have, _ our turn, become the strongest team in our school.2It took her a long time to cool _ after the argument.3He stayed in the background to escape _ the public attention.4On October 17, at 9：25 am, she gave birth _ a beautiful baby girl.5A person, _ a machine, is not replaceable.答案：1.in2.
5、down3.from4.to5.unlike.完成句子1The other day the cat _ three kitties. (birth)几天前这只猫生了三只小猫。2If you fly to Shanghai, you will _. (attend)如果你乘飞机去上海，你就能够及时赶上出席会议。3Now it is _ the room. (turn)现在轮到我们打扫房间。4The polluted water can _. (harmful)污染的水会对环境造成很大的危害。5His father _ work in another city. (prevent)他父亲阻止他去另
6、一个城市工作。6Man is born free, but _. (chain)人生来是自由的，然而他却无处不受束缚。7_ so hardworking. (unlike)那么勤奋不像他平常的样子。8Nowadays, there are still many people wondering _. (existence)现在仍有很多人想知道，地球是何时开始存在的。9The student _. (puzzled)这个学生对下一步做什么感到困惑。10They often _. (argue)他们之间经常吵架很凶。答案：1.gave birth to2.be able to attend the
7、 meeting in time3.our turn to clean4.be very harmful to the environment5.prevented him from going to6.everywhere he is in chains7.Its unlike him to be8.when the world came into existence9.was puzzled about what to do next10.argue with each other violently.完形填空Space is a dangerous place, not only bec
8、ause of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts _1_ our protective blanket on _2_. Light gets through, and this is essential _3_ plants to make the food which we _4_. Heat, _5_，makes our environments tolerable and some ultraviolet (紫外线的) rays pen
9、etrate the _6_. Cosmic (宇宙的) rays of various kinds come _7_ the air from outer space , but _8_ quantities of radiation from the sun are screened off. _9_ men leave the atmosphere they are _10_ to this radiation, _11_ their spacesuits or the walls of their spacecraft，if they are inside, _12_ prevent
10、a lot of radiation damage. Radiation is the greatest known danger to explorers in _13_. Doses of radiation are measured in _14_ called “rems (雷目)”. We all _15_ radiation here on earth from the sun，from cosmic rays and from radioactive minerals. The “_16_” dose of radiation that we receive each year
11、is about two millirems. It _17_ according to where you live, and this is a very rough estimate. Scientists have the reason to think _18_ a man can _19_ far more radiation _20_ without being damaged. The figure of 60 rems has been agreed.1A.for Bwith Con Das2A.stars Bsun Cearth Dspace3A.with Bfrom Cu
12、nder Dfor4A.use Blive Ceat Dget5A.again Balso Cbesides Dtoo6A.environment Bspace Catmosphere Dearth7A.across Bto Cfrom Dthrough8A.valid Benormous C. various Dproper9A.As soon as BAs well as CAs much as DAs possible as10A.shown Bexposed Cfaced Dcovered11A.but Bbecause Cso Dso that12A.get Bmake Chave
13、Ddo13A.earth Batmosphere Cspace Denvironment14A.pieces Bunits Cparts Dsystems15A.receive Baccept Cbring Dcatch16A.conventional Bcommon Cgeneral Dnormal17A.puzzles Bfloats Ccombines Dchanges18A.what Bwhich Cthat Dwhy19A.put up with Bkeep up with Ccome up with Dcatch up with20A.from Bthan Cas Daway答案与
14、解析：本文是一篇说明文。太阳和其他星体发出的射线对人类既有利又有弊，那么大气层对此又是如何起作用的呢？人们能承受的安全射线数是多少雷目呢？1解析：act for代表，代理；act on按照行事；act as充当，起作用。句意：大气层再次对我们起到保护伞的作用。答案：D2解析：由上题可知大气层起到保护伞的作用，保护的应该是地球。故选C项。答案：C3解析：be essential for对来说是首要的、基础的，为固定搭配。答案：D4解析：由题意可知植物依靠阳光来制造我们吃的食物，故选C项。答案：C5解析：句意：热能也能使我们的生活环境温度适宜，并且一些紫外线可以穿透大气层。also一般紧跟动词；besides一般用在句首；too可用在句中，用逗号隔开。答案：D6解析：根据上题所讲，penetrate(穿透)这个动词后面应接atmosphere“大气层”这个名词。答案：C7
