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61. Do you agree or disagree with the following statement ? Grandparents cannot give useful advice to their grandchildren because the world of today and the world of 50 years ago are too different.练习人数： 8
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62.练习人数： 24
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63.练习人数： 12
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64.练习人数： 10
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65.练习人数： 11
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66.练习人数： 12
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67.练习人数： 86
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68.练习人数： 11
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69.练习人数： 7
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70.练习人数： 17
