Why do people learn foreign languages?
...
Why do people dye their hair?
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Why do people get ill (sick)?
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Why do people join gyms?
...
Why do people work overtime?
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Why do women wear make-up?
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Why do people compete?
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Why do people recycle things?
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Why do people don't work?
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Why do people buy online?
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Why do people help other people?
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People buy second-hand things because...
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Why do people surf the Internet because...
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Why life without a mobile phone would be impossible these days?
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Why do people tell lies?
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Why being famous is tiring?
...
