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71. If you want to change one aspect to improve your health, which would you choose? Why? 1. The kinds of food you eat 2. The amount of the exercise you do 3. The amount of the stress in your life练习人数： 24
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72.练习人数： 0
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73.练习人数： 22
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74.练习人数： 2
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75.练习人数： 14
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76.练习人数： 0
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77.练习人数： 10
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78.练习人数： 0
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79.练习人数： 11
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80.练习人数： 7
