1、Unit 4 Astronomy the science of the stars.单句语法填空1The plant Professor Li is studying exists (exist) only in Australia.2The course is designed to help students to understand the structure of those two systems (system)3Scientists developed several theories (theory) on what else might determine which ha
2、nd you write with.4Because of the violent (violence) wind, many people couldnt go to work.5The fouryearold Russian girl has drawn global (globe) attention for her great gift for languages.6Unlike (like) the tradition in the West, the family name in China is put first, which is followed by the given
3、name.7The air is harmful (harm) to health, so you mustnt enter the room.8Over the past ten years, Mr. Green has_multiplied (multiply) his money many times.9We were puzzled (puzzle) about the sudden disappearance of our guide at that moment.10The government is spending billions (billion) of dollars o
4、n new rail projects.阅读理解Mars is the secondsmallest planet in the Solar System. And like the Earth, the climate of Mars has changed over time. Today, Mars is cold and dry and liquid water is not stable on the surface. However, Mars has valley networks, deltas and lake deposits (沉积物). It means it must
5、 have had freely flowing water at some point, probably around 4 billion years ago.But climate models of the planets deep past havent been able to produce warm enough conditions to allow liquid water on the surface. “There are people trying to model Mars ancient climate using the same kind of models
6、we use here on Earth, and theyre having a really hard time doing it. Its difficult to create a warm ancient Mars because the Sun was less brighter then and the whole Solar System was cooler at that time，” said Briony Horgan, an assistant professor of earth, atmosphere and planet sciences at Purdue U
7、niversity. “While a lot of people are using climate models, were coming at this from a special view what do the volcanic (火山的) records of Mars tell us？”Volcanic eruptions (喷发) always happened throughout Mars early history. When volcanoes erupt under the ice, the mixture of heat and melt water could
8、create flattopped mountains called “tuyas”， or table mountains. “We now have data that say there had to have been ice on Mars at some point，” said Ackiss, a Ph.D. candidate at Purdue.If researchers could find evidence for the volcanic activity under ice elsewhere, it would make sure the case for a v
9、ery cold ancient Mars. But dont fear, space lovers. This doesnt kill the possibility of past life on Mars. “Even if Mars was a cold and icy wasteland, these volcanic eruptions acting with ice could have created a little happy place for life to exist，” Horgan said.【语篇解读】本文是一篇说明文，介绍了科学家Briony Horgan根据
10、火山运动预测过去火星的气候。1According to Paragraph 1, Mars in our Solar System _.Ahad water long agoBhas cold and wet climateChas valleys and lakes nowDis the second largest planet答案与解析：A细节理解题。根据第一段中的“It means it must have had freely flowing water at some point, probably around 4 billion years ago.”可知，过去火星上有水。2W
11、hen talking about the research of Mars ancient climate, Briony Horgan _.Awas confused about the change of itBsuggested studying it in the traditional wayCwas for climate models used on Earth for itDconsidered volcanic records as important evidence答案与解析：D细节理解题。根据第二段中的“While a lot of people are using
12、climate models, were coming at this from a special view.”可知，Briony Horgan认为火山记录是研究过去火星气候很重要的证据。3What can be inferred from the last two paragraphs?AThere was no ice on Mars in old days.BThere might be living things on ancient Mars.CThe volcanic eruptions showed evidence of life.DThe volcanoes on Mars
13、 erupt frequently nowadays.答案与解析：B推理判断题。根据第四段中的“This doesnt kill the possibility of past life on Mars.”以及“these volcanic eruptions acting with ice could have created a little happy place for life to exist”可知，过去火星上可能会存在生命。.完形填空Wildfires continue sweeping across Southern California. Some families are
14、returning home to find their houses are completely _1_ and many things turned to dust and ashes (灰烬). Its _2_， but stories of hope, like the one from this Ventura County couple, are beginning to _3_.Don and Julie Myers had been evacuated (撤离) from their home, and when they returned, they didnt _4_ t
15、o find some things after the big fire. The couple had a safety box. _5_， when they opened it, it seemed that everything was _6_. Still, the firefighters onsite helped them _7_ the safety box carefully just _8_ there was anything that can be saved. Don _9_ to look through the remnants (遗留物), and by d
16、oing so, he found his wifes original wedding ring.Julie has two rings: the original one, which was _10_ in the safety box, and a new one that Don bought for their 25th anniversary. She was _11_ the new ring at the time of the fire. Once they found the original ring, Don got down on one knee and repr
17、oposed (再次求婚) to Julie, proving that in times of _12_， acts of love win the victory.“It was truly _13_ that he found it. I had thought we had _14_ it because everything else was totally damaged，” Julie says. “My son photographed the proposal. It was very meaningful and I was terribly _15_.”“The supp
18、ort from the people in the city of Ventura was amazing，” Julie says. She advises those who want to offer help to _16_ shopping cards, because most people have so many things to _17_ after big disasters._18_， the wildfires in Southern California have _19_ 230,000 acres of land, including parts of Los
19、 Angeles, San Diego, Riverside, Ventura, and Santa Barbara counties. There are several organizations that are looking for _20_ and contributions; you can find more information here.【语篇解读】本文是一篇记叙文，一场大火吞噬了南加利福尼亚，Don和Julie也在大火中失去家园，但他们的结婚戒指却在大火中失而复得。大火还见证了人们之间的无私援助和真情。1A.destroyed Bremoved Cmissed Ddec
20、orated答案与解析：A根据下文的“many things turned to dust and ashes”可知，大火持续吞噬南加利福尼亚，一些家庭重返家园，发现他们的房子完全被焚毁(destroyed)。2A.touching Bheartbreaking Cdisappointing Dsurprising答案与解析：B大火毁掉了一切，所以可推测，这是令人伤心的(heartbreaking)。3A.change Bhide Ccompare Dappear答案与解析：D尽管大火无情，充满希望的故事还是有的，结合下文，Don和Julie Myers的爱情故事出现奇迹，故可推出答案。4A.
21、expect Bstop Cremember Dagree答案与解析：A根据上文的“many things turned to dust and ashes”可推测，他们并没有期待(expect)能在大火后找到点什么东西。5A.Therefore BHowever CBesides DOtherwise答案与解析：B根据上文的“The couple had a safety box.”可推测，虽然他们有一个保险箱，但(However)当他们打开它，却发现几乎所有的东西都被毁掉了。6A.unrecognizable Bcomplete Cimpossible Dwonderful答案与解析：A火
22、势如此之大，箱子里的很多东西都变得无法辨认(unrecognizable)。7A.check Bfill Cclose Dempty答案与解析：A根据下文的“look through the remnants”可知，在场的消防员帮他们查看(check)保险箱。8A.in case Bas ifCnow that Dor else答案与解析：A在场的消防员帮他们查看保险箱，以防(in case)还能找到一些可以挽救的东西。9A.pretended Bregretted Crefused Dcontinued答案与解析：DDon继续(continued)在大火烧过的遗留物中寻找。10A.stuck
23、 Bkept Cforgotten Dleft答案与解析：B他们有两个戒指，以前的结婚戒指保存(kept)在保险箱里。11A.taking off Bresearching Cbreaking up Dwearing答案与解析：D在火灾发生时，Julie戴着(wearing)新戒指。12A.determination Bdisaster Ccongratulation Ddepression答案与解析：BDon的这个举动证明，在灾难时刻，爱的行动最后会胜过一切。按照语境，他们找到结婚戒指时正处于灾难现场，故可推出答案。13A.amazing Bamusing Cfrightening Dann
24、oying答案与解析：A能在大火灰烬中找到结婚戒指，这种结局的确让人惊讶(amazing)。14A.thrown Bdiscovered Cmistaken Dlost答案与解析：DDon原以为会失去(lost)那枚结婚戒指，因为一切都被大火烧得面目全非。15A.moved Bnervous Cproud Dupset答案与解析：A根据上文的“It was very meaningful and I was terribly”可推测Julie是很感动的(moved)。16A.rent Bput upCgive away Dlend答案与解析：C她建议想要提供帮助的人可以给他们捐(give aw
25、ay)一些购物卡。17A.select BreplaceCrepair Ddesign答案与解析：B大火过后，大多数家庭的物品需要置换(replace)，因为他们家中财产几乎付之一炬。18A.Unfortunately BStrangely CSuddenly DEagerly答案与解析：A不幸的是(Unfortunately)，南加州的野火烧毁了230,000英亩的土地。19A.ignored Bsurrounded Cburned Dburied答案与解析：C因为发生的是大火，故应该是烧毁了(burned)230,000英亩的土地。20A.volunteers BleadersCcompe
26、titors Demployees答案与解析：A大火过后，一些救援组织需要的应该是志愿者(volunteers)和人们捐赠的物资。.短文改错I will never forget what happened last Christmas. That day, I had bad cold. While I was waiting my turn on the doctors office, an old man and his wife came to the front desk. The husband had trouble breathe. As they were paying, I
27、 heard the nurse say polite, “Although you are on medical help, but you still have to give me another $1.50.”“But you have only 50 cents，” the wife said sadly. Hearing this, I walked over and said that I will pay the remaining $1.00. They were such thankful that they gave thank to me. I never though
28、t $1.00 were enough to help anyone, but that day I discovered that $1.00 really could make a difference.答案：I will never forget what happened last Christmas. That day, I had bad cold. While I was waiting my turn the doctors office, an old man and his wife came to the front desk. The husband had troub
29、le . As they were paying, I heard the nurse say ， “Although you are on medical help, you still have to give me another $1.50.”“But have only 50 cents，” the wife said sadly. Hearing this, I walked over and said that I wil pay the remaining $1.00. They were thankful that they gave to me. I never thought $1.00 enough to help anyone, but that day I discovered that $1.00 really could make a difference.