1、Unit 4 第二课时.单项填空1_ the universe began with the “big bang” has been widely accepted.AWhether BWhyCThat DWhat答案：C 句意：宇宙开始于 “大爆炸”已被广泛接受。从句中意义完整，只需要引导词，故选 C。2It has been proved _ having a balanced diet helps to keep healthy.Aif BbecauseCwhen Dthat答案：D 句意：据证明拥有一个均衡的饮食有助于保持健康。it 为形式主语，后面从句为真正的主语，且从句意义完整，故
2、选 D。3_ well go camping tomorrow depends on the weather.AIf BWhetherCThat DWhere答案：B 由 depends on the weather 可知，此处应为“是否”之意，应用 if 或whether，而主语从句置于句首时只能用 whether。故选 B。4(2014莱阳高一检测)_ is a fact that English is being accepted as an international language.AThere BThisCThat DIt答案：D 句意：英语正被接受成为国际性语言是一个事实。此处
3、用 it 作形式主语，that 从句为真正的主语。5_ made the parents proud was _ their son had been admitted to a key university.AWhat; because BWhat; thatCThat; what DThat; because答案：B 第一个空用 what 引导主语从句，what 在该从句中充当主语；was 后为表语从句，该从句中不缺少任何成分，故用 that 引导，且不可省略。故选 B。6It worried him a bit _ his memory was becoming worse.Awhile
4、 BthatCif Dwhat答案：B it 为形式主语，真正的主语从句中不缺少任何成分，故用 that 引导主语从句，且不可省略。7(2014九江高一检测)_ their flight will arrive on time is _ they are concerned about.AWhether; what BWhether; thatCWhen; what DHow; that答案：A 根据语境，主语从句应用 whether 引导，表示未定的事；what 引导表语从句，在从句中作 are concerned about 的宾语。8_ makes the book so extraor
5、dinary is the creative imagination of the writer.AThat BWhatCWho DWhich答案：B 主语从句缺少主语要用 what 引导。9When and why he came here _ yet.Ais not known Bare not knownChas not known Dhave not been known答案：A 句意：他什么时候以及为什么来这儿还不知道。when and why 引导的从句作主语，谓语动词用单数，且不被知道，故选 A。10He left home several days ago. _ worries
6、 many people and is to be found out.AWhere he has goneBWhere did he goCWhich place has he goneDWhere has he gone答案：A 考查从句的语序。这是一个主语从句，需使用陈述句语序。故选 A。11(2014烟台高一检测) Steve Jobs has gone but _ he has left behind is truly extraordinary.Athat BwhyCwhat Dhow答案：C 分析句子结构可知， “_he has left behind”是主语从句，且关系代词在从
7、句中作宾语，故选 what。12(2014天津，14)I think _ impress me about his painting is the colours he uses.Awhat BthatCwhich Dwho答案：A 考查名词性从句。句意：我认为关于他的绘画让我印象深刻的是他使用的颜色。impresses 缺少主语，故用 what 引导名词性从句；that 引导名词性从句，不作成分。13(2014泰安高一检测)_ is known to all is _ we won 38 gold medals in 2012 London Olympic Games.AIt; that B
8、As; whatCWhat; that DThat; what答案：C 句意：众所周知， 2012 年伦敦奥运会上我们赢得了 38 枚金牌。_is known to all 是主语从句，从句中缺少主语，意为“所 的” ，应由 what 引导；第二个 is后的部分是表语从句，且从句表陈述意义，应由 that 引导，且不可省略。故选 C。14_ seems to be no possibility _ Li Hua can win the first prize in the 100meter race.AIt; that BThere; thatCThere; whether DIt; whet
9、her答案：B There seems to be 是固定表达；第二个空填 that，引导同位语从句补充说明possibility 的具体内容。故选 B。15Why and how he came here _ yet.Ais not known Bare not knownChas not known Dhave not been known答案：A 句意：他为什么及如何来这儿还不知道。 Why and how 引导的从句主语，谓语动词用单数，且不被知道，故选 A。.完形填空The biggest safety threat facing airlines today may not be
10、a terrorist with a gun, but the man with the portable computer in business class. In the past 15 years，_1_have reported well over 100_2_that could have been caused by electromagnetic interference(干扰). The_3_of this interference remains unconfirmed，_4_increasingly, experts are pointing the blame at p
11、ortable electronic devices such as portable computers, radios and cassette players and mobile telephones.RTCA, an organization which_5_the aviation industry, has recommended that_6_airlines ban such electronic devices from being used_7_“critical”stages of flight， _8_takeoff and landing. Some experts
12、 have gone further，_9_for a total ban during all flights. Currently, rules on using these devices are_10_up to individual airlines. And although some airlines prohibit(禁止)passengers from_11_such equipment during takeoff and landing, most are reluctant to enforce a total ban. Many passengers want to
13、work during flights.The_12_is predicting how electromagnetic fields_13_affect an aircrafts computers. Experts_14_that portable devices emit radiation, which affects those wavelengths which_15_use for navigation and communication. But, they have not been able to_16_these effects in a laboratory; they
14、 have no_17_of knowing whether the interference might be_18_or not.The fact that aircraft may be vulnerable(易受攻击)to interference_19_the risk that terrorist may use radio system in order to_20_navigation equipment.1A.drivers BpilotsCengineers Dconductors答案：B 文章第一句已表明：当今航空公司面对的最大的安全威胁不是持枪的恐怖分子，而是手提电脑。
15、所以对飞机上的这种事情最了解的应是飞行员，而不是 A、C、D的那些人。2A.actions BeventsCmatters Dincidents答案：D 此处指飞机上发生的这类事情。本题同样考查了词义辨析。incident 指“较小的事件，插曲，小故事” ，action 是“(采取的) 行动”之意，event 是“大事件” ，matter指“问题，事情，或麻烦事”等，均不合适。3A.reason BeffectCsource Dstory答案：C 根据下句话得知“ 手提电脑，移动电话”等这些电子装置应是“干扰源” ，而不是受干扰的结果，受干扰的应当是飞机。reason 不合适是因为 reaso
16、n 接 for 而不接of，表示 “的原因” 。4A.and BforCbut Dso答案：C “没有确认”(unconfirmed) 与“在增加”(increasing)中间应是转折关系，不是递进、因果关系，所以不选 A、B、D。5A.advises BpersuadesCensures Dwarns答案：A 因为下文用了 recommend(劝告) 一词，所以这个组织应该是向航空工业提建议的一个组织，这样才前后一致。6A.some BseveralCall Dno答案：C 因为这种电磁的(electromagnetic)干扰对飞机航空的安全造成最大的威胁，所以应该是所有的飞机都要有这样的禁
17、令。7A.for BwithCby Dduring答案：D 此处指飞机在飞行期间的一些对技术设备要求严格、要求高的时期，一定要严禁使用此类装置，例如：起飞、降落等。critical 原意为“挑剔的，紧要危急的” ，在此略有转义；stage 原意“舞台 ”，此处意指“阶段，时期” ，所以用 during。8A.particularly BspeciallyCunfortunately Dpossibly答案：A 据上面解释，特别是起飞时。9A.looking BcallingCwaiting Dasking答案：B 有些专家要求更高，要求在飞行期间要禁用：call for 意为“需要，要求” ；
18、ask for 意为 “要，索取 ”。10A.put BleftCgiven Dsent答案：B 表示目前使用这些设置的规矩都留了下来，由那些 individual airlines 自己决定，因为下文有表达：许多乘客还是想在飞机上办公。11A.carrying BtakingCfixing Dusing答案：D 这种装置可以携带，不能使用，一旦使用会产生电磁效应干扰，所以选D。禁止使用，而不是禁止携带， fix 是“安装” ，一般没有人专门上飞机安装。12A.possibility BdifficultyCnecessity Didea答案：B 推断出电磁效应是如何影响飞机的计算机，这在目前
19、是件难事，如果不难，科学家能解决，就不必有禁令了，所以选 difficulty。13A.must BshouldCneed Dmight答案：D 表示“可能” 。因为拿不准，所以用 might 表示可能，语气轻。14A.know BtellCguess Dthink答案：A 这些手提装置已广为人们所用，所以科学家是“知道” ，而不是“猜”或“认为” ，tell 后缺少 sb。15A.aircrafts BtrainsCships Dcars答案：A 该文讲的都是航空，选 A(飞机，飞行器)。16A.restudy BretellCreproduce Drenew答案：C 该句主语为 they，
20、指的是那些有电磁效应的装置，因此不选 A、B。选项 C表义为“再现” ；而 renew 意为 “更新，重新开始” 。17A.key BwayCstep Dtrick答案：B 因为这些装置在实验室里那些干扰还未能再现，所以科学家们就没有办法(have no way of doing)得知这种干扰是否危险。18A.dangerous BstrongChelpful Duseful答案：A 全文讲述的是电子产品的电磁干扰对飞机安全性的威胁，本空用 dangerous点明主题。19A.faces BraisesCruns Dtakes答案：B 飞机容易受干扰攻击的这一事实增加了恐怖分子冒险利用无线电系
21、统破坏航空设备的可能性。根据最后一句话及全文的整体意思，说明飞机对干扰是非常敏感的，因此此类装置对犯罪分子破坏飞机装备的可能性就增加了。20A.repair BguideCdefend Ddestroy答案：D 恐怖分子只会冒险破坏，而不会去修理、引导等。.阅读理解The earth is the only planet that scientists think has life. Why does the earth have life while the other planets dont? For one thing, the earth is just the right temp
22、erature. As the_third_planet from the sun，the earth seems to be just the right distance away. The planets which are closer to the sun are so hot that their surfaces bake(烘烤)in the sun. The farthest planets are cold balls.When the earth developedwhich scientists believe may have happened about 4 bill
23、ion years agomany gases covered the earth. The gases caused the earth to be hot. But something wonderful happened. The temperature was just right for thick clouds to form. It rained very hard for a very long time. This gave the earth its oceans. Water made it possible for plants to grow. The plants
24、created oxygen in the atmosphere. Oxygen is the gas that humans and animals breathe.Only one other planet in the solar system seems to be something like the earth. That planet is Mars (火星 ). Mars is smaller than the earth，and it is quite a bit cooler. But it is not too cold for humans. On some days,
25、 the temperatures are as low as a winter day in the northern United States. If you wore a special spacesuit, you could walk around on Mars. You would have to bring your own air to breathe，because the air on Mars is too thin to breathe.Mars has the largest volcano(火山 )in the solar system. It is sixte
26、en miles high. The highest volcano on the earth is five miles high. The most unexpected(未预料到的)sight on Mars is driedup river beds. Scientists believe that Mars was once much better than it is now. Does this mean there could have been living things on Mars? Scientists are not sure, but there has been
27、 no sign so far.文章大意：文章介绍了地球存在生命的原因以及火星的情况。1Which of the following is NOT the reason that the earth has life?AThe earth is just the right temperature.BThe volcanos on the earth are lower than those on Mars.CThere is oxygen in the atmosphere of the earth.DThe earth seems to be just the right distance
28、 away from the sun.答案：B 细节理解题。文中提到地球是可证实的唯一有生命存在的太阳系行星，其原因包括地球温度合适、距太阳距离适中和大气里含有氧气等。B 项火山与此无关。2The underlined phrase“the third planet”in the first paragraph refers to_.Athe Sun Bthe MoonCthe Earth Dthe Mars答案：C 词义猜测题。根据第一段中内容可知距离太阳第三远的行星指的是地球。3Which of the following about the Mars is NOT true?AThere
29、 could have been living things on Mars.BMars has the largest volcano in the solar system.CThere is almost no oxygen in the air on Mars.DMars is smaller than the earth，and it is quite a bit cooler.答案：A 细节理解题。文章最后一段提到火星上有干涸的河床的迹象，但这一点并不能证实火星上存在生命，因为还没有生命迹象，故 A 项不正确。其他三项都与文章相符。4Which of the following is probably the best title for the passage?AThe EarthBThe MoonCPlanets in the Solar SystemDMars is Most Like the Earth答案：D 主旨大意题。文章先说明地球上存在生命的原因又对比了火星和地球，说明火星是与地球最相似的行星。D 项做标题最为恰当。
