正文材料：
Lesson20 One man in a boat
Fishing is my favorite sport. I often fish for hours without catching anything. But this does not worry me. Some fishermen are unlucky. Instead of catching fish, they catch old boots and rubbish. I am even less lucky. I never catch anything-not even old boots. After having spent whole mornings on the river, I always go home with an empty bag. 'You must give up fishing!' my friends say.' It's a waste of time.' But they don't realize one important thing. I'm not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all!
ˈlɛsən20 wʌn mæn ɪn ə boʊt
ˈfɪʃɪŋ əz maɪ ˈfeɪvərɪt spɔrt. aɪ ˈɔfən fɪʃ fər ˈaʊərz wɪˈθaʊt ˈkæʧɪŋ ˈɛniˌθɪŋ. bət ðɪs dəz nɑt ˈwɜri mi. səm ˈfɪʃərmɪn ər ənˈlʌki. ɪnˈstɛd əv ˈkæʧɪŋ fɪʃ, ðeɪ kæʧ oʊld buts ənd ˈrʌbɪʃ. aɪ əm ˈivɪn lɛs ˈlʌki. aɪ ˈnɛvər kæʧ ˈɛniˌθɪŋ-nɑt ˈivɪn oʊld buts. ˈæftər ˈhævɪŋ spɛnt hoʊl ˈmɔrnɪŋz ɑn ðə ˈrɪvər, aɪ ˈɔlˌweɪz goʊ hoʊm wɪð ən ˈɛmpti bæg. jʊ məst gɪv ʌp ˈfɪʃɪŋ!' maɪ frɛndz seɪ.' ɪts ə weɪst əv taɪm.' bət ðeɪ doʊnt ˈriəˌlaɪz wʌn ɪmˈpɔrtənt θɪŋ. aɪm nɑt ˈrɪli ˈɪntrəstəd ɪn ˈfɪʃɪŋ. aɪ əm ˈoʊnli ˈɪntrəstəd ɪn ˈsɪtɪŋ ɪn ə boʊt ənd ˈduɪŋ ˈnʌθɪŋ ət ɔl!
任务设置：L0+L1+L4
L0:跟原音朗读
L1：练习tickets、return、return、certainly、Wednesday、performance
L4：（总结）
音标还是不熟练，导致最近几课严重超时。（需要单独抽空把念不好的音标再加强一下）
