1、双基限时练(十)Unit 4Part .单词拼写1. He was interested in a_ and always stayed up at night to watch the stars.答案astronomy2. On May 12, 2008, an v_ earthquake struck Wenchuan County, Sichuan, China.答案violent3. Computer hackers have broken down security s_， raising questions about the safety of information.答案sy
2、stem4. The mixture of gases that surround the earth is called a_.答案atmosphere5. Forming a good habit of studying is _ (基础) to ones achievements in the years to come.答案fundamental6. He stuck to his _ (理论) and it proved to be correct at last.答案theory7. This produces _ (连串) of reactions.答案chain8. Smoki
3、ng is h_ to your health.答案harmful9. If you m_ 4 by 5, the answer is 20.答案multiply10. Now we still dont know whether life e_ on Mars.答案exists.单句语法填空(不多于3个单词)1I advise you to give up smoking, for smoking is _ (harm) to health.答案与解析harmful句意：我建议你戒烟，因为抽烟有害健康。此处应填其形容词形式。2We usually take turns _ (do) clea
4、ning, and today it is my turn _ (do) it.答案与解析to do; to do考查搭配take turns to do sth. “轮流干某事”及It is ones turn to do sth. “轮到某人干某事”。3There is a _ (puzzle) look on her face. Actually, she felt _ (puzzle) about all of this.答案与解析puzzled; puzzledpuzzled“感到困惑的”， puzzling“令人困惑的”。4The novel written by the auth
5、or sells best, but five years ago no one could have imagined how great a role he was _ (play) in the literary world.答案与解析to playwas to play表示后来将要发生的事情。5_ Alice will be able to get help for the rescue is not certain yet.答案与解析Whetherwhether (是否)在句中引导主语从句。if作“是否”解，引导主语从句时，从句不能位于句首。6As the busiest woman
6、 in Norton, she made _ her duty to look after all the other peoples affairs in that town.答案与解析itit在句中作形式宾语，真正的宾语为后面的不定式短语。7Cindy didnt leave the office last night _ she finished her job.答案与解析until句意：辛迪昨晚直到完成了工作才离开办公室。not . until“直到才”， until引导的时间状语从句中用短暂性动词。8Although the traffic was heavy, I managed
7、to be _ time for the important lecture.答案与解析in句意：尽管遇到了交通堵塞，我还是设法及时地参加了那个重要的讲座。in time“及时”，符合句意。9Before she goes to class, she usually chains her bike _ a tree.答案与解析tochain . to . “用链子把拴在上”。10It is _ (unlike) that he will come to help soon because he has just gone out.答案与解析unlikely此句考查句型It is likely/
8、unlikely that .根据语意，应为“不可能”之意。11They kept the door of the house _ (lock), so nobody could get in through it.答案与解析locked此处考查“keep宾语宾补”结构。lock与door为动宾关系，故用过去分词作补语。12The direction _ which the president would go was kept secret _ safety concern.答案与解析in; for句意：为了安全起见，总统的去向保密。第一空用in, in . direction表示“向某个方
9、向”。第二空用for, for . concern表示“出于的考虑”。.同义句转换1. He came to Beijing for the first time.It is the first time that he _ been _ Beijing.答案has; in2. My classmates as well as I went to the park yesterday.My classmates went to the park yesterday. I went _ _.答案as well3. You will regret sooner or later.You will
10、regret _ _.答案in time4. My little son filled the tank with water.The tank was _ _ water.答案full of5. There is a difference between this book and that one.This book _ _ _ that one.答案is different from.根据课文内容，完成语法填空According _1_a widely accepted theory, the universe began with a “Big Bang”. For several b
11、illion years after the “Big Bang”， the earth was still just a cloud of dust, _2_settled into a solid globe. The earth became very _3_(violence), and later it produced many gases, which were _4_(make) the earths atmosphere. Water had also appeared on the earth, which allowed the earth to dissolve _5_
12、(harm) gases _6_acids into the oceans and seas. Then life began to develop._7_ understood plants were the start of changes. They multiplied and filled the oceans and seas. Small land animals appeared and produced young generally by _8_(lay) eggs. After that, some huge animals existed on the earth fo
13、r more than 140 million years.Mammals were different from all life forms in the past; they gave birth _9_the young baby animals and produced milk to feed them. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping _10_ the earth into space.1_2._3._4._5_6._7.
14、_8._9_10._答案1.to2.which3.violent4.to make5.harmful6and7.Nobody8.laying9.to10.from.阅读理解AEdmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets (彗星) which other scientists had made. The orbit of one particular comet was a very difficult mathematical
15、problem. He could not figure it out. Neither could other scientists who dealt with such problem.However, Halley had a friend named Isaac Newton, who was a brilliant mathematician. Newton thought he had already worked out that problem, but he could not find the papers on which he had done it. He told
16、 Halley that the orbit of a comet had the shape of an ellipse (椭圆形)Now Halley set to work. He figured out (计算出) the orbits of some of the comets that had been observed by scientists. He made a surprising discovery. The comets that had appeared in the years 1531,1607, and 1682 all had the same orbit.
17、 Yet their appearances had been 75 to 76 years apart.This seemed very strange to Halley. Three different comets followed the same orbit. The more Halley thought about it, the more he thought that there had not been three different comets, as people thought. He decided that they had simply seen the s
18、ame comet three times. The comet had gone away and had come back again.It was an astonishing idea! Halley felt certain enough to make a prediction (预言) of what would happen in the future. He decided that this comet would appear in the year 1758. There were 53 years to go before Halleys prediction co
19、uld be tested.In 1758 the comet appeared in the sky. Halley did not see it, for he had died some years before. Ever since then that comet had been called Halleys comet，in his honour.1Edmund Halley figured out the orbit of _.A. some different comets appearing several timesB. the same comet appearing
20、at different timesC. three different comets appearing three timesD. several comets appearing at the same time答案与解析B根据第四段和最后一段可得出答案。2Halley made his discovery _.A. by doing experimentsB. by means of his own careful observationC. by using the work of other scientistsD. by chance答案与解析C根据第三段内容可知，哈雷是在计算其
21、他科学家的数据。3Halley made a surprising, but correct prediction in the year _.A. 1704B. 1705 C. 1706D. 1707答案与解析B根据倒数第二段，1758531705。4This passage in general is about _.A. Halley and other scientistsB. the orbit of a cometC. Newton and HalleyD. Halley and his discovery答案与解析D全篇在讲述哈雷和哈雷彗星。5Which of the follo
22、wing is TRUE?A. Edmund Halley was an American scientist.B. Halley made his discovery by doing experiments.C. Isaac Newton was a famous mathematician.D. The orbit of a comet had the shape of a triangle.答案与解析CIsaac Newton(牛顿)是一个著名的数学家和物理学家。其余三项均可在文中找到排除依据。Halley是英国人，从第一段第一句可知； Halley靠计算和预言不是靠做实验；彗星的轨道
23、是椭圆形，不是三角形，从第二段可以找到。BWelcome to the Astronomy (天文学) Club of Akron (ACA) webpage. The purpose of the ACA is to further an interest in and to promote the study of the subject of astronomy through the use of lectures, discussion groups, publications，programs and other activities.The ACA will educate th
24、e general public through monthly programs. These programs, lectures and events cover the planets, solar/lunar observing, comets (彗星) showers，deep sky objects and so on.The ACA activities provide opportunities for its general club members to get together and take part in a variety of general astronom
25、y related matters.Membership is open to anyone with an interest in astronomy. No equipment is necessary and no knowledge is needed. There is no age limit. Club members meet on the 4th Friday of every month at 8 a. m. at the Kiwanis Hall in Portage Lakes. During the meeting, a onehour talk will be on
26、 astronomy, space exploration or weather. The date of the meeting will change if the 4th Friday is part of a holiday weekend. Check the calendar, view the most recent newsletter (简报), send emails or call the number listed on our home page if in doubt. The ACA publishes a monthly newsletter, The Nigh
27、t Sky, which contains information on the coming meetings, observing sessions and articles by members.Club dues are $30 a year for adults (18 and over), $15 for juniors (12 to 17). The family only needs $ 40 a year. Welcome to our club and you can call 18663399783 to find more information about us.6T
28、he ACA is really a(n) _.A. webpage B. clubC. office D. magazine答案与解析B根据文章第一段的第一句“Welcome to the Astronomy Club of Akron (ACA) webpage”可知， the ACA是一个俱乐部。故该题的正确答案为B项。7From the passage, we can know the ACA wants to _.A. make much moneyB. get more people interested in astronomyC. sell equipmentD. hold m
29、ore meetings答案与解析B根据文章第一段的第二句“. further an interest in and to promote the study of the subject of astronomy .”可知，这个组织是想推动广大群众对天文学的兴趣。故该题的正确答案为B项。8If you wonder when the meeting will be held, you can do all of the following EXCEPT _.A. visit the managers officeB. consult the latest The Night SkyC. ca
30、ll the number listed on the home pageD. send emails答案与解析A根据文章第四段的最后两句“Check the calendar, view the most recent newsletter, send emails, or call the number listed on our home page if in doubt.The ACA publishes a monthly newsletter, The Night Sky, which contains .”可知，本题应选A项。9Which of the following thi
31、ngs should the club members do?A. Attend the programs of this club.B. Have a meeting every Friday.C. Spend money in using the clubs equipment.D. Give a lecture on astronomy every month.答案与解析A根据文章第二段“The ACA will educate the general public through monthly programs”可知，A项正确。10How much should Lucy and her parents pay a year if they join the club?A. $75. B. $60.C. $40. D. $15.答案与解析C从题干看应是Lucy一家人，故应按“The family only needs$40 a year”付费。故该题的正确答案为C项。