1、Unit4Astronomy:the science of the starsWhy do people travel abroad?Think of the purposes of travelling abroadTravel abroadsightseeing work Cloze testpart 1The earth was just a cloud of dust after the“Big Bang”The earth 1._(explode)loudly with fire and rock.They were 2._ time to produce many things，w
2、hich were to make the earths atmosphere.3._ the earth cooled down，water began to appear on its surface.It allowed the earth to dissolve 4._(harm)gases.Then life began to develop.The first small plants multiplied and filled the oceans and seas 5._ oxygen.This encouraged the 6._(develop)of early shell
3、fish and fish.Land animals appeared after green plants appeared.Small clever animals 7._(spread)all over the earth.They are putting too 8._carbon dioxide into the atmosphere，which prevent heat from escaping from the earth into space.9._ life will continue on the earth for millions of years to come w
4、ill depend on 10._ this problem can be solved.inAsharmfulexplodedwithdevelopmentspreadmuchWhetherwhetherin time 及时；终于fill A with B 用B充满A Important words&expressionspart 2n.&vt.拉；拖；牵引力拉；拖；牵引力1.pull_ The handshake seems to be longer than elsewhere.So do not pull away from the handshake.Everyone was ve
5、ry concerned whether he would pull through or not.So long as we pull together theres no mountain top we cant conquer.挣脱；脱离；脱身康复；完成；使渡过难关齐心协力归纳总结：和pull有关的短语pullpull in _pull out _pull up_(车辆，船只）进站，靠岸，靠边停靠离站；拉出；取出pull together_齐心协力pull away from _挣脱；脱离；脱身pull through _康复；完成；使渡过难关pull down _pull（使车辆等）停
6、住拆毁，摧毁Describe the following 3 pictures with“pull”phrases:pull away frompull away frompull outpull outpull uppull up2 2 harmful_Freezing winter is harmful to orange trees.These days,breaking traffic rules and littering are not uncommon,causing serious harm to life and environment.对.有害 be harmful to
7、cause/do harm toadj.有害的有害的Ptheres no harm in doing.不妨做不妨做.Ex.不妨说出你的想法no harm in saying what you think harmful3 puzzle3.puzzle puzzlen.迷，难题迷，难题vt&vi.（使）迷惑（使）为难（使）迷惑（使）为难puzzlen.迷，难题迷，难题vt.&vi.(使使)迷惑迷惑(使使)为难为难 puzzlen.迷，难题迷，难题vt&vi.（使）迷惑（使）为难（使）迷惑（使）为难puzzlen.迷，难题迷，难题vt.&vi.(使使)迷惑迷惑(使使)为难为难puzzledadj.
8、感到困惑的感到困惑的puzzlingadj.令人困惑的令人困惑的 puzzlen.迷，难题迷，难题vt&vi.（使）迷惑（使）为难（使）迷惑（使）为难puzzlen.迷，难题迷，难题vt.&vi.(使使)迷惑迷惑(使使)为难为难puzzledadj.感到困惑的感到困惑的puzzlingadj.令人困惑的令人困惑的puzzlementn.迷惑；费解迷惑；费解Ex.puzzled4puzzledpuzzlingpuzzlement 4 exist_Dinosaurs existed on the earth for more than 140 billion years.There exists
9、a good way to solve the exsisting problem.Scientists have many theories about how the universe first came into existence.There exist.有有.came into existence 产生；成立，开始存在产生；成立，开始存在vi.存在；生存存在；生存P无被动无被动无进行无进行5 5 in time_Andy know he could not reach the house in time.Youll succeed in time because you are a
10、lways working hard.归纳拓展:time的相关短语：at no time 决不决不 at one time 曾经，一度曾经，一度 on time 准时准时 at a time 依次，每次依次，每次 in no time 立刻，马上立刻，马上及时，最终及时，最终Ex.at times 有时有时用time的相关短语完成小片段曾经一度我对滑冰十分痴迷。然而我却时常摔倒在冰面上，但是我知道如果缺乏训练我绝对不会熟练。_ I grew crazy about skating.However,I fell onto the ground _,but I knew that I would
11、_ be skilled if I lack of practice.At one timeat timesat no time一、用适当的介词填空：1.As the old saying goes,its easier to pull _ than to build up.2.Last night,Mrs.Green had a heart attack.But luckily,the doctor came _ time to save her life.二、完成句子：1.As we all know,a bad eating habit _(对.有害)ones health.2.The _（疑惑的表情）on her face suggested she didnt understand what I said.downoutis harmful to puzzled look三、改错：1.Whatever happens,in no time will I give up.2.There was existed a certain doubt among the workers as for the necessity of the work.3.The problem was very puzzling that I couldnt understand it.atso
