练习材料：
Lesson21 Mad or not?
Aeroplanes are slowly driving me mad. I live near an airport and passing planes can be heard night and day. The airport was built years ago, but for some reason it could not be used then. Last year, however, it came into use. Over a hundred people must have been driven away from their homes by the noise. I am one of the few people left. Sometimes I think this house will be knocked down by a passing plane. I have been offered a large sum of money to go away, but I am determined to stay here. Everybody says I must be mad and they are probably right.
ˈlɛsn21 mæd ɔː nɒt?
ˈeərəpleɪnz ɑː ˈsləʊli ˈdraɪvɪŋ miː mæd. aɪ lɪv nɪər ən ˈeəpɔːt ænd ˈpɑːsɪŋ pleɪnz kæn biː hɜːd naɪt ænd deɪ. ði ˈeəpɔːt wɒz bɪlt jɪəz əˈgəʊ, bʌt fɔː sʌm ˈriːzn ɪt kʊd nɒt biː juːzd ðɛn. lɑːst jɪə, haʊˈɛvə, ɪt keɪm ˈɪntuː juːz. ˈəʊvər ə ˈhʌndrəd ˈpiːpl mʌst hæv biːn ˈdrɪvn əˈweɪ frɒm ðeə həʊmz baɪ ðə nɔɪz. aɪ æm wʌn ɒv ðə fjuː ˈpiːpl lɛft. ˈsʌmtaɪmz aɪ θɪŋk ðɪs haʊs wɪl biː nɒkt daʊn baɪ ə ˈpɑːsɪŋ pleɪn. aɪ hæv biːn ˈɒfəd ə lɑːʤ sʌm ɒv ˈmʌni tuː gəʊ əˈweɪ, bʌt aɪ æm dɪˈtɜːmɪnd tuː steɪ hɪə. ˈɛvrɪbɒdi sɛz aɪ mʌst biː mæd ænd ðeɪ ɑː ˈprɒbəbli raɪt.
选择/eə/音练习:
/ˈeərəpleɪnz/ /ˈeəpɔːt/ /ðeə/
任务配置：L0+L1+L4
练习感悟: 学习是很枯燥的一件事情。
