练习材料：Lesson 7 Too late（54s）
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 wəz leɪt ənd dɪˈtɛktɪvz wə /ˈweɪtɪŋ/ ət ði ˈeəpɔːt ɔːl /ˈmɔːnɪŋ/. ðeɪ wər /ɪksˈpɛktɪŋ/ ə ˈvæljʊəbl /ˈpɑːsl/ əv ˈdaɪəməndz frəm saʊθˈæfrɪkə. ə fjuː ˈaʊəz ˈɜːlɪə, ˈsʌmwʌn həd təʊld ðə pəˈliːs ðət θiːvz wəd traɪ tə stiːl ðə ˈdaɪəməndz. wɛn ðə pleɪn əˈraɪvd, sʌm əv ðədɪˈtɛktɪvz wə ˈweɪtɪŋ ɪnˈsaɪd ðə meɪn /ˈbɪldɪŋ/ waɪl ˈʌðəz wə ˈweɪtɪŋ ɒn ði ˈeəfiːld. tuː mɛn tʊk ðə ˈpɑːsl ɒf ðə pleɪn ənd ˈkærid ɪtˈɪntə ðə ˈkʌstəmz haʊs. waɪl tuː dɪˈtɛktɪvz wə /ˈkiːpɪŋ/ gɑːd ət ðə dɔː, tuː ˈʌðəz ˈəʊpənd ðə ˈpɑːsl. tə ðeə səˈpraɪz, ðə ˈprɛʃəs ˈpɑːslwəz fʊl əv stəʊnz ənd sænd!
任务配置：L0+L1
知识笔记：
生词和短语
detective /dɪˈtɛktɪv/ n. 侦探
parcel /ˈpɑːsl/ n. 包裹
detectives were waiting at the airport all morning 句中的动词时态是过去进行时
keep guard 守卫
to their surprise 使他们吃惊的是
练习/ŋ/的发音：
1）嘴唇张开，舌后部抬起贴住软腭，阻止气流从口腔泄出。
2）软腭下垂，气流从鼻腔泄出，同时震动声带发音。
音标相关单词练习：
waiting /ˈweɪtɪŋ/
morning /ˈmɔːnɪŋ/
ring /rɪŋ/ n. 戒指
think /θɪŋk/ vt. 想
singer /'sɪŋə/ n. 歌手
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