练习材料：
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!
任务配置：
L0+L4
知识笔记：
一、音标
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!
二、生词。
detective：n.侦探
parcel n.包裹
South Africa 南非
the Customs House 海关
keep guard 警戒，守卫
sand n.沙，沙滩
练习感悟：
1.录音时长：55秒；朗读时长：55秒。练习朗读时长59分钟，相关知识学习25分钟。
2.今天查找了一些相关的课程，有些课程讲解了语法时态等，纠结要不要看这些课程。可是每天朗读的时间就要花一个小时左右，而且我目前主要完成的都是基础的L0，还没有练习音标。我想到S老师的讲解语音，先练朗读再管其他的，因此决定先完成L0，有时间再L1，先把发音、语调等练好点。
