练习材料：
Lesson 4 an exciting trip
i have just received a letter from my brother, tim.he is in australia.he has been there for six months.tim is an engineer.
he is working for a big firm and he has already visited a great number of different places in australia.
he has just bought an australian car and has gone to alice springs a small town in the centre of australia.he will soon visit
darwin. from there ,he will fly to perth.my brother has never been abroad before, so he is finding this trip very exciting.
[aɪ] [hæv] [dʒʌst] [rɪˈsiːvd] [ə] [ˈletə] [frɒm] [maɪ] [ˈbrʌðə] .[hiː] [ɪz] [ɪn] [ɒˈstreɪlɪə] .[hiː] [hæz] [biːn] [ðeə; ðə] [fɔː] [sɪks] [mʌnθs] .[ɪz] [æn] [endʒɪˈnɪə] .[hiː] [ɪz] [ˈwɜːkɪŋ] [fɔː] [ə] [bɪg] [fɜːm] [ænd] [hiː] [hæz] [ɔːlˈredɪ] [ˈvɪzɪtɪd] [ə] [greɪt] [ˈnʌmbə] [ɒv] [ˈdɪf(ə)r(ə)nt] [ˈpleɪsɪz] [ɪn] [ɒˈstreɪlɪə] .[hiː] [hæz] [dʒʌst] [bɔːt] [æn] [ɒˈstreɪliən] [kɑː] [ænd] [hæz] [gɒn] [tuː] [ˈælɪs] [sprɪŋz] [ə] [smɔːl] [taʊn] [ɪn] [ðə] [ˈsentə] [ɒv] [ɒˈstreɪlɪə] .[hiː] [wɪl] [suːn] [ˈvɪzɪt] .[ˈdɑːwɪn] .[frɒm] [ðeə] .[hiː] [wɪl] [flaɪ] [tuː] [pɜːθ] .[maɪ] [ˈbrʌðə] [hæz] [ˈnevə] [biːn] [əˈbrɔːd] [bɪˈfɔː] .[səʊ] [hiː] [ɪz] [ˈfaɪndɪŋ] [ðɪs] [trɪp] [ˈverɪ] [ɪkˈsaɪtɪŋ; ek-]
任务配置：L0+L2+L3+L4
知识笔记：
朗读（L0）:已完成
音标（L1）：
听力（L2）：听课程原音，模仿。
复述（L3）：已完成，上传至C群中，时长48s
互动（L5）：无
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