Unit4Astronomy:thescienceofthestarsⅠ.语法单句填空1．________existedacertaindoubtamongtheworkersastothenecessityofthework.答案：There句意为：对于做这份工作的必要性，工人们存在一定的疑惑。Thereexists/existed...有；存在；相当于Therebe...结构。2．Thetransformationofourcitywillmake________possibleforpeopleheretohaveacomfortableenvironment.答案：it句意：城市改造将使得这里的人们有一个舒适的环境。it作形式宾语，真正的宾语为句后的不定式的复合结构。3．Thefestivalofthisyearhasbeenagreatsuccess,________(like)theyearbeforewhenitrainednon­stop.答案：unlike句意：今年这个节日过得很成功，不像前年过节时，雨下个不停。unlike意为“不同；不像”，符合题意。like“相像的；类似的”。4．Theactorsaid________he'daccepttheroleintheplaydependedontheplotofit.答案：whether由dependedontheplotofit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。5．Whenthefirebroke________，manypeoplewereshoppinginthesupermarket.答案：out考查动词短语意义。句意：当火灾发生时，很多人正在超市里购物。breakout“战争、火灾、疾病的突然发生”。6．Whilecrossingthestreet,pleasewatch________forthecomingcars.答案：out句意：过马路时，要留心来往的车辆。watchout“注意，当心”，与介词for连用；takecare与becareful后面多与不定式连用。watchover“照看”，为及物动词短语。7．Withtheweatherbecominghotterandhotter,weneedcurtainstoblock________thesunshine.答案：out句意：随着天气变得越来越热，我们需要窗帘来挡住阳光。blockup“塞住”；blockout“挡住(光线)”。8．Peoplehopethatmeasureswillbetakentopreventhousepricesrising________(rise)．答案：(from)rising考查动词词义。句意：人们希望采取措施阻止房价上升。prevent...(from)．..“阻止……干……”，与句意相符。keep...from...“阻止……干……”，介词from不能省。9．Whynotchangeyourmindnow______youhavefoundthatthereissomethingwrongwithyourplan?答案：that句意：既然你发现了你的计划有问题，为什么不改变主意呢？nowthat“既然”，引导原因状语从句。10．________theuniversebeganwiththe“bigbang”hasbeenwidelyaccepted.答案：That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that来引导主语从句。Ⅱ.阅读理解(2013·乌鲁木齐高三三诊)Alaskanblackbearshibernateforuptosevenmonthsayear,duringwhichtimetheydonoteatordrink,beforewakingupinvirtuallythesamephysicalstatetheyfellasleepin.Nowexpertshopetodevelopmethodsofputtinghumansintoasimilarstatewhichcouldhelpastronautssurvivelongmissionsandleadtonewwaysoftreatingseverelyillpatients.Whilemanystudieshaveexaminedhibernationinmiceandhedgehogs,littleresearchhasbeendoneintothesameconditioninlargermammalssuchasbears