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21. Do you agree or disagree with the following statement: Universities should require every graduation student to take public speaking courses. Give specific examples and details to support your answer.练习人数： 737
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22.练习人数： 0
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23.练习人数： 175
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24.练习人数： 139
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25.练习人数： 271
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26.练习人数： 88
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27.练习人数： 176
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28.练习人数： 74
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29.练习人数： 23
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30.练习人数： 54
