练习材料：
Lesson80 The Crystal Palace
Perhaps the most extraordinary building of the nineteenth century was the Crystal Palace, which was built in Hyde Park for the Great Exhibition of 1851. The Crystal Palace was different from all other buildings in the world, for it was made of iron and glass. It was one of the biggest buildings of all time and a lot of people from many countries came to see it. A great many goods were sent to the exhibition from various parts of the world. There was also a great deal of machinery on display. The most wonderful piece of machinery on show was Nasmyth's steam hammer. Though in those days, traveling was not as easy as it is today, steam boats carried thousands of visitors across the Channel from Europe. On arriving in England, they were taken to the Crystal Palace by train. There were six million visitors in all, and the profits from the exhibition were used to build museums and colleges. Later, the Crystal Palace was moved to South London. It remained one of the most famous buildings in the world until it was burnt down in 1936.
pəˈhæps ðə məʊst ɪksˈtrɔːdnri ˈbɪldɪŋ ɒv ðə ˈnaɪnˈtiːŋθ ˈsɛnʧʊri wɒz ðə ˈkrɪstl ˈpælɪs, wɪʧ wɒz bɪlt ɪn haɪd pɑːk fɔː ðə greɪt ˌɛksɪˈbɪʃən ɒv 1851. ðə ˈkrɪstl ˈpælɪs wɒz ˈdɪfrənt frɒm ɔːl ˈʌðə ˈbɪldɪŋz ɪn ðə wɜːld, fɔːr ɪt wɒz meɪd ɒv ˈaɪən ænd glɑːs. ɪt wɒz wʌn ɒv ðə ˈbɪgɪst ˈbɪldɪŋz ɒv ɔːl taɪm ænd ə lɒt ɒv ˈpiːpl frɒm ˈmɛni ˈkʌntriz keɪm tuː siː ɪt. ə greɪt ˈmɛni gʊdz wɜː sɛnt tuː ði ˌɛksɪˈbɪʃən frɒm ˈveərɪəs pɑːts ɒv ðə wɜːld. ðeə wɒz ˈɔːlsəʊ ə greɪt diːl ɒv məˈʃiːnəri ɒn dɪsˈpleɪ. ðə məʊst ˈwʌndəfʊl piːs ɒv məˈʃiːnəri ɒn ʃəʊ wɒz Nasmyth's stiːm ˈhæmə. ðəʊ ɪn ðəʊz deɪz, ˈtrævlɪŋ wɒz nɒt æz ˈiːzi æz ɪt ɪz təˈdeɪ, stiːm bəʊts ˈkærid ˈθaʊzəndz ɒv ˈvɪzɪtəz əˈkrɒs ðə ˈʧænl frɒm ˈjʊərəp. ɒn əˈraɪvɪŋ ɪn ˈɪŋglənd, ðeɪ wɜː ˈteɪkən tuː ðə ˈkrɪstl ˈpælɪs baɪ treɪn. ðeə wɜː sɪks ˈmɪljən ˈvɪzɪtəz ɪn ɔːl, ænd ðə ˈprɒfɪts frɒm ði ˌɛksɪˈbɪʃən wɜː juːzd tuː bɪld mju(ː)ˈzɪəmz ænd ˈkɒlɪʤɪz. ˈleɪtə, ðə ˈkrɪstl ˈpælɪs wɒz muːvd tuː saʊθ ˈlʌndən. ɪt rɪˈmeɪnd wʌn ɒv ðə məʊst ˈfeɪməs ˈbɪldɪŋz ɪn ðə wɜːld ənˈtɪl ɪt wɒz bɜːnt daʊn ɪn 1936.
任务配置：
L0＋L4
知识笔记：
新词：extraordinary 卓越的；exhibition 陈列，展览；iron 铁器，铁制品；various 各种各样的，多方面的；machinery 机器；display 显示器，陈列品，炫耀；steam 蒸汽；hammer 链球，铁锤；profit 盈利，利润；college 大学；
1、on /upon doing sth
刚一做某事（就），相当于as soon as引导的时间状语从句。
例如：On arriving at the village,these college students went to help the farmers with their work.
=As soon as they arrived at the village,these college students went to help the farmers with their work.
Upon going out of the room,Jack heard his cellphone ringing.
=As soon as he went out of the room,Jack heard his cellphone ringing.
2、once doing
一旦做某事，连词once +动名词，可以看作是once 条件状语从句的省略，相当于once 引导的条件状语从句
例如：Once making a promise,you should try your best to fulfil it.
=Once you have made a promise,you should try your best to fulfil it.
3、使用on/upon doing和once doing sth，必须注意，后面句子主语就是前面doing 动作的发出者。
4、当 后面句子主语与once 后面的动词动作是被动关系时，经常使用过去分词。
例如：Once bitten,twice shy.
练习感悟：
今天成功早起！！！
生词很多，但是读起来很顺。新概念的朗读速度渐渐加快，我也再也不用压着速度了……很棒。今天有一个语言点差一点点就遗漏过去了，就是on doing 的句型。
真的是仅仅浏览可以大概无视，但是语法知识还是要扣一扣。庆祝第八十天。
