| Module 1 Environment and life Unit 1 Saving the Earth Unit 2 Life in the future Exercises Key to the exercises Module 2 Recreation and entertainment Unit 3 Going places Unit 4 All about films and TV Unit 5 A story by Mark Twain Exercises Key to the exercises 词性转换 Exercises （Ⅰ） Key to the exercises Exercises （Ⅱ） Key to the exercises 词汇释义 Exercises Key to the exercises 词义辨析 Exercises Key to the exercises Word list Phrase list |
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