人教版高中英语同步练习：必修3 unit 4 section ⅰ(含答案).doc

Unit 4 Astronomy：the science of the stars Section ⅠWarming Up Reading 课时精练（人教版必修3，课标通用） Ⅰ.课文缩写 The earth was just a cloud of __1__ after the “Big Bang”．The earth __2__ loudly with fire and rock.They were in __3__ to produce many things, which were to make the earths atmosphere.As the earth cooled down，water began to appear on its surface.It allowed the earth to dissolve __4__ gases.Then life began to develop. The first small plants __5__ and filled the oceans and seas with oxygen.This encouraged the __6__ of early shellfish and fish.Land animals such as insects，reptiles and dinosaurs and so on appeared after green plants appeared.Small clever animals __7__ all over the earth.They are putting too __8__ carbon dioxide into the atmosphere, which __9__ heat from the earth into space.Whether life will continue on the earth for millions of years to come will __10__ on whether this problem can be solved. 答案　1.dust　2.exploded　3.time　4.harmful　5.multiplied　6.development　7.spread　8.much　9.prevents　10.depend Ⅱ.单词拼写 1．He was interested in ________ (天文学)and always stayed up at night to watch the stars. 2．Computer hackers have broken down security ________(系统), raising questions about the safety of information. 3．Too much sugar can be ________(伤害)to childrens teeth. 4．The three-star hotel offers a friendly ________ (气氛)and personal service. 5．What you did would ________ (阻止)the children from playing computer games too much. 6．Marys ________(到场)at the party last night was not noticed. 7．6 ________ (乘) by 5 is 30. 8．________(理论)is based on practice. 9．Not long ago a ________(剧烈)earthquake occurred off the coast of Indonesia. 10．My sister ________(困惑) me and causes me anxiety. 答案　1.astronomy　2.systems　3.harmful　4.atmosphere　5.prevent　6.presence　7.multiplied　8.Theory　9.violent　10.puzzles .翻译与仿写 1．Last month I was lucky enough to have a chance to make a trip into space with my friend Li Yanping, an astronomer. 翻译：_____________________________________________________仿写：只有二十个学生被选出到国外学