1、综合练(四)1“What kind of Thanksgiving can I provide？” I said to myself.Living in a small house and still jobless，I 1 to make ends meet.Still，I counted my blessing (知足) when I 2 that a young family in a nearby home lost 3 to a flash fire.I watched as the entire community went to their 4 ：A church provide
2、d shelter；others gathered food，bedding and clothing.Lines of busy people willingly gave their time 5 their money.The afternoon before Thanksgiving，two women came to our house 6 donations (捐赠物品)Although we had 7 to spare，I helped early items to their car， 8 in my heart to give more.As we stood 9 chat
3、ting，my little Helen，only three，shouted，“Wait！Dont anybody move.” She rushed into the house，complaining，“We 10 something！”I looked apologetically at the ladies，but 11 I could follow her，Helen was back outside，carrying her 12 toy bear，which I had made for her birthday just two months before.“Mommy，”
4、her green eyes searched my 13 ，“the little girl doesnt have any toys.I have to give it to her.”My heart quaked.I thought about the few 14 Helen had and how many hours I had spend sewing (缝) this one.Now she wanted to 15 it away.We stood in silence，the ladies 16 at me.I struggled with my feelings.I t
5、hought of all the things we needed and didnt have.Everyone held their 17 as I bent down to face Helen.“Of course，Helen.” My voice nearly 18 ，“youre right.We forgot the toy.How 19 of you to remember！”And I 20 my own heart would never be as big as the one pounding (砰砰地跳) in my daughters little chest.1
6、A.struggled BdecidedCprepared Dhappened2A.expected BannouncedClearned Dbelieved3A.nothing BsomethingCanything Deverything4A.trouble BhelpCexperience Dwork5A.except for Binstead ofCrather than Das well as6A.collecting BreportingCrequiring Dallowing7A.less BmoreClittle Dmuch8A.refusing BofferingCwaiti
7、ng Dwishing9A.downstairs BupstairsCoutside Dinside10A.needed Bgave Cremembered Dforgot11A.since Bbefore Cwhen Dthough12A.expensive Bfavorite Cfriendly Dugly13A.face Bhead Cheart Dbody14A.books Bclothes Cfriends Dtoys15A.take Bthrow Cgive Dput16A.aiming Bshouting Cglimpsing Dstaring17A.words Bsteps C
8、breath Dhands18A.broke Bfailed Cappeared Dstopped19A.proud Bthoughtful Cnatural Dclever20A.admitted BwishedCexplained Drealized2A huge cloud of dust rose and an overpass disappeared.This was the scene in Zhuzhou，Hunan Province on May 17.Nine people were killed and 16 injured.Things were similar last
9、 year in the Sichuan earthquake.Thousands of people were buried in the ruins and lost their lives.What if we could have warned them?People are always racking their brains to find a way of preventing buildings collapse.Better materials and technology help，but they are not a solution.Just like humans，
10、a building has its own life cycle from “birth” to “death”If we know when a building is going to collapse，we can repair it in advance or get out of it before it falls.Now，scientists at the University of Illinois have developed a material that turns red before it breaks.The invention could be used in
11、things like climbing ropes or bridge supports.The research was led by Nancy Sottos，a professor at the universitys Beckman Institute，and Douglas Davis，a graduate research assistant.The secret behind the colorchanging material is a type of molecule (分子)A molecule is a group of atoms held together by c
12、hemical bonds.Imagine you and your friends standing in a circle，holding hands.Each person stands for one atom，your hands represent the bonds，and the entire circle represents a molecule.If one person lets go of his or her hands，the molecule changes color.The research team put the molecule into a soft
13、 material.When the researchers stretched the material，it turned bright red for a few seconds before it broke into two pieces.When they repeatedly stretched and relaxed the material，without breaking it，it only turned a little red.The major problem is that light can get rid of the red color.When the t
14、eam shone bright light on the molecule，the broken bond was fixed，and the color disappeared.If the bright light keeps the red color from appearing，the materials warning system will be useless.Scientists still have a lot of work to do before the colorchanging molecules can be used outside the lab.1Wha
15、t does the passage mainly introduce?AThe collapse of an overpass in Zhuzhou，Hunan Province.BThe Sichuan earthquake last year.CA material that turns red before it breaks.DA way of preventing building from collapsing.2The underlined words “racking their brains” in the third paragraph mean _.Asuffering
16、 a lotBcollecting beyond imaginationClosing a lotDthinking very hard3Which of the following is a WRONG statement?AThousands of people died from the collapse of buildings in the Sichuan earthquake because theyhadnt been warned.BThere is no building that will never collapse.CA new material has been ap
17、plied to buildings to warn people of collapse.DA colorchanging material can turn red before it breaks.4What is the major problem in the research of the colorchanging material?ABright light can get rid of the red color.BWhen the material is relaxed，the color disappears.CThe materials warning system i
18、s useless.DThe molecules only change color in the lab.5What can we infer from the passage?AThe colorchanging molecules are certain to be used outside the lab.BThere will be no collapse with the help of the colorchanging material.CThere is a long way to go before the material can be applied.DThe problem caused by bright light will be solved by scientists.答案11A 2C 3D 4B 5D 6A 7C 8D 9C 10D 11B 12B 13A 14D 15C 16D 17C 18A 19B 20D 21C 2D 3C 4A 5C3
