Merge pull request #6 from SMU-SIS/gh-pages

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Merge pull request #7 from SMU-SIS/gh-pages

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Merge pull request #8 from SMU-SIS/gh-pages

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Merge pull request #9 from SMU-SIS/gh-pages

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Merge pull request #10 from SMU-SIS/gh-pages

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Solve the logic problem of showing outcome and sample answers
Merge pull request #66 from ruijunhuang2010/gh-pages

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