练习材料：
Lesson27 A wet night
Late in the afternoon, the boys put up their tent in the middle of a field. As soon as this was done, they cooked a meal over an open fire. They were all hungry and the food smelt good. After a wonderful meal, they told stories and sang songs by the camp fire. But some time later it began to rain. The boys felt tired so they put out the fire and crept into their tent. Their sleeping-bags were warm and comfortable, so they all slept soundly. In the middle of the night, two boys woke up and began shouting. The tent was full of water! They all leapt out of their sleeping-bags and hurried outside. It was raining heavily and they found that a stream had formed in the field. The stream wound its way across the field and then flowed right under their tent!
ˈlɛsən27 ə wɛt naɪt
leɪt ɪn ði ˌæftərˈnun, ðə bɔɪz pʊt ʌp ðɛr tɛnt ɪn ðə ˈmɪdəl ʌv ə fild. æz sun æz ðɪs wʌz dʌn, ðeɪ kʊkt ə mil ˈoʊvər ən ˈoʊpən ˈfaɪər. ðeɪ wɜr ɔl ˈhʌŋgri ænd ðə fud smɛlt gʊd. ˈæftər ə ˈwʌndərfəl mil, ðeɪ toʊld ˈstɔriz ænd sæŋ sɔŋz baɪ ðə kæmp ˈfaɪər. bʌt sʌm taɪm ˈleɪtər ɪt bɪˈgæn tu reɪn. ðə bɔɪz fɛlt ˈtaɪərd soʊ ðeɪ pʊt aʊt ðə ˈfaɪər ænd krɛpt ˈɪntu ðɛr tɛnt. ðɛr ˈslipɪŋ-bægz wɜr wɔrm ænd ˈkʌmfərtəbəl, soʊ ðeɪ ɔl slɛpt ˈsaʊndli. ɪn ðə ˈmɪdəl ʌv ðə naɪt, tu bɔɪz woʊk ʌp ænd bɪˈgæn ˈʃaʊtɪŋ. ðə tɛnt wʌz fʊl ʌv ˈwɔtər! ðeɪ ɔl lɛpt aʊt ʌv ðɛr ˈslipɪŋ-bægz ænd ˈhɜrid ˈaʊtˈsaɪd. ɪt wʌz ˈreɪnɪŋ ˈhɛvəli ænd ðeɪ faʊnd ðæt ə strim hæd fɔrmd ɪn ðə fild. ðə strim wund ɪts weɪ əˈkrɔs ðə fild ænd ðɛn floʊd raɪt ˈʌndər ðɛr tɛnt!
任务配置：L0+L1+L4
知识笔记：
an open fire
We cook meat on an open fire outside.
我们在户外的火堆上烤肉。
creep
crept
to move slowly, quietly and carefully, because you do not want to be seen or heard 悄悄地缓慢行进；蹑手蹑脚地移动
creep into
音标专练：[ɔ]
发音要点：
张开口，牙床接近半开，但张口程度比[ɑ]要小，和英音中的[ɔ:]相对应，但比英音中的[ɔ:]要大；
舌身低平后缩，舌后部抬起，舌位高于[ɑ]音；
双唇稍稍收圆，并向前突出；
这是个长元音，记住：长元音一定要拉长，发出来才好好听；
美音中的[ɔ]和[a]发音类似，区分要点是[a]发音时嘴唇和脸颊完全放松，而[ɔ]发音时脸颊稍稍向内吸并略微前移。
练习感悟：开始S英语晨读之后再来读新概念，会感觉难点/需要注意的点着实不少。一个音标一个音标的攻克吧。
原声时长：71s
录音时长：70s
练习时间：30min
