练习材料：
There was a time when the owners of shops and businesses in Chicago that to pay large sums of money to gangsters in return for 'protection.' If the money was not paid promptly, the gangsters would quickly put a man out of business by destroying his shop. Obtaining 'protection money' is not a modern crime. As long ago as the fourteenth century, an Englishman, Sir John Hawkwood, made the remarkable discovery that people would rather pay large sums of money than have their life work destroyed by gangsters.
ðɛr wʌz ə taɪm wɛn ði ˈoʊnərz ʌv ʃɑps ænd ˈbɪznəsəz ɪn ʃəˈkɑˌgoʊ ðæt tu peɪ lɑrʤ sʌmz ʌv ˈmʌni tu ˈgæŋstərz ɪn rɪˈtɜrn fɔr prəˈtɛkʃən.' ɪf ðə ˈmʌni wʌz nɑt peɪd ˈprɑmptli, ðə ˈgæŋstərz wʊd ˈkwɪkli pʊt ə mən aʊt ʌv ˈbɪznəs baɪ dɪˈstrɔɪɪŋ hɪz ʃɑp. əbˈteɪnɪŋ prəˈtɛkʃən ˈmʌni ɪz nɑt ə ˈmɑdərn kraɪm. æz lɔŋ əˈgoʊ æz ðə ˈfɔrˈtinθ ˈsɛnʧəri, ən ˈɪŋglɪʃmən, sɜr ʤɑn Hawkwood, meɪd ðə rɪˈmɑrkəbəl dɪˈskʌvəri ðæt ˈpipəl wʊd ˈræðər peɪ lɑrʤ sʌmz ʌv ˈmʌni ðæn hæv ðɛr laɪf wɜrk dɪˈstrɔɪd baɪ ˈgæŋstərz.
任务配置：L0、L1、L2、L3、L4
知识笔记：
单词
promptly/ˈprɒm(p)tli/ 1. at once or without delay; 2.exactly on time; punctually:
Obtain/əbˈteɪn/Get, acquire, or secure (something)
音标
/ʊ/发音要点：1.舌身后缩，舌尖离开下齿。2.舌后部向软颚抬起，舌位比发/u:/要低。3.双唇收圆，稍微外突.4.短元音，发音时嘴型小而圆，嘴角肌肉放松。
点评
would/ wʊd/的发音中的 /ʊ/一般容易发生直白的乌音，口型没有收圆。
练习感悟：
每一个任务都有重要的效果，最好是练全套。
