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Physics is the present day equivalent of what used to be called natural philosophy, from which most of present day science arose.（）
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Physics is the present day equivalent of what used to be called natural philosophy, from what most of present day science arose.（）
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Physics is the present day equivalent of that used to be called natural philosophy, from which most of present day science arose.（）
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Physics is the present day equivalent of （） used to be called natural philosophy, from （） most of present day science arose.
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Physics is the present day equivalent of （） used to be called natural philosophy, from （） most of present day science arose.
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