练习材料：
lesson 7 too late
the plane was late and detectives were waiting at the airport all morning. they were expecting a valuable parcel of diamonds from south africa. a few hours earlier, someone had told the police that thieves would try to steal the diamonds. when the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. two men took the parcel off the plane and carried it into the customs house. while two detectives were keeping guard at the door, two others opened the parcel. to their surprise, the precious parcel was full of stones and sand.
[ðə] [pleɪn] [wɒz] [leɪt] [ænd] [dɪˈtektɪv] [wə(r)] [ˈweɪtɪŋ] [æt] [ðə] [ˈeəpɔːt] [ɔːl] [ˈmɔːnɪŋ] [ðeɪ] [wə(r)] [ɪkˈspekt] [ə] [ˈvæljʊb(ə)l] [ˈpɑːs(ə)l] [ɒv] [ˈdaɪəməndz] [frɒm] [saʊθ] [ˈæfrɪkə] [ə] [fjuː] [ˈaʊəz] [ˈɜːlɪə(r)] [ˈsʌmwʌn] [hæd] [təʊld] [ðə] [pəˈliːs] [ðæt] [θiːvz] [wʊd] [traɪ] [tuː] [stiːl] [ðə] [ˈdaɪəməndz] [wen] [ðə] [pleɪn] [aˈraɪvd] [sʌm] [ɒv] [ðə] [dɪˈtektɪv] [wə(r)] [ˈweɪtɪŋ] [ɪnˈsaɪd] [ðə] [meɪn] [ˈbɪldɪŋ] [waɪl] [ˈʌðə(r)] [wə(r)] [ˈweɪtɪŋ] [ɒn] [ðə] [ˈeəfiːld] [tuː] [men] [tʊk] [ðə] [ˈpɑːs(ə)l] [ɒf] [ðə] [pleɪn] [ænd] [ˈkærɪd] [ɪt] [ˈɪntʊ] [ðə] [ˈkʌstəmz] [haʊs] [waɪl] [tuː] [dɪˈtektɪv] [wə(r)] [ˈkiːpɪŋ] [gɑːd] [æt] [ðə] [dɔː] [tuː] [ˈʌðə(r)] [ˈəʊpənd] [ðə] [ˈpɑːs(ə)l] [tuː] [ðeə] [səˈpraɪz] [ðə] [ˈpreʃəs] [ˈpɑːs(ə)l] [wɒz] [fʊl] [ɒv] [stəʊnz] [ænd] [sænd]
任务配置：L0+L4
知识笔记：
detective [dɪˈtektɪv] n.侦探
expect [ɪkˈspekt] vt.期望;认为（某事）会发生 vi.期待;
valuable [ˈvæljuəbl] adj. 有价值的;贵重的，宝贵的;可评估的 n.贵重物品，财宝
diamond [ˈdaɪəmənd] n.钻石
try to
try to do sth.设法做某事；
try doing sth.试图做某事；
区别是：try to do侧重努力，为了达到目的而努力。try doing 只是一种新的尝试，不带明显的目的性。
some of
直接在名词前使用时， 用some，后面跟复数
如果名词前出现了冠词，指示词或形容词性物主代词， 又或者要在代词前使用some的话， 就要多加一个of。some of 后面是可数名词，名词一定是复数；some of 后面如果是不可数名词，名词一定是单数
练习感悟：
main[meɪn]这个单词很坑，因为java开发中main是非常常见的一个词，于是华丽丽的十年都读错了（[maɪn]），然后查了以下才发现，最离谱的是，Java这个词，读错的更加普遍。
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