Lesson 68 Persistent 纠缠不休 First listen and then answer the question. 听录音，然后回答以下问题 ...

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Lesson 66 Sweet as honey! 像蜜一样甜！ First listen and then answer the question. 听录音，然后回答 ...

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Lesson 71 A famous clock 一个著名的大钟 First listen and then answer the question. 听录音，然后回 ...

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Lesson 67 Volcanoes 火山 First listen and then answer the question. 听录音，然后回答以下问题。 Why ...

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Lesson 72 A car called bluebird “蓝鸟”汽车 First listen and then answer the questi ...

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Lesson 65 Jumbo versus the police 小象对警察 First listen and then answer the question. 听录音，然 ...

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Lesson 70 Red for danger 危险的红色 First listen and then answer the question. 听录音，然后回答以 ...

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Lesson 63 She was not amused 她并不觉得好笑 First listen and then answer the question. 听录音，然 ...

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Lesson 69 But not murder! 并非谋杀！ First listen and then answer the question. 听录音，然后回答以 ...

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Lesson 55Not a gold mine并非金矿First listen and then answer the question.听录音，然后回答以下问题。 ...

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Lesson 56Faster than sound!比声音还快！First listen and then answer the question.听录音，然后回答以 ...

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Lesson 58 A blessing in disguise? 是因祸得福吗？ First listen and then answer the question. 听录音 ...

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Lesson 60 The future 卜算未来 First listen and then answer the question. 听录音，然后回答以下问题。 ...

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Lesson 53 Hot snake 触电的蛇 First listen and then answer the question. 听录音，然后回答以下问题。 ...

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Lesson 54 Sticky fingers 粘糊的手指 First listen and then answer the question. 听录音，然后回答以 ...

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Lesson 61Trouble with the Hubble哈勃望远镜的困境First listen and then answer the question.听录音，然 ...

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Lesson 42Not very musical并非很懂音乐First listen and then answer the question.听录音，然后回答以下 ...

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Lesson 45 A clear conscience 问心无愧 First listen and then answer the question. 听录音，然后回答 ...

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Lesson 40 Food and talk 进餐与交谈 First listen and then answer the question. 听录音，然后回答以下 ...

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Lesson 43 Over the South Pole 飞越南极 First listen and then answer the question. 听录音，然后回答 ...

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