People get divorced because...
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People learn foreign languages because...
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People join gyms because...
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People work overtime because...
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Women wear make-up because...
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People recycle things because...
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People get a tattoo because...
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People smoke because...
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People lose their jobs and become unemployed because...
...
People do voluntary work because...
...
It’s difficult to understand art because...
...
People tell lies because...
...
