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34 According to the writers, what might the use of spices in cooking help people to avoid?
35 What proportion of bacteria in food do four of the spices tested destroy? /
36 Which food often contains a spice known as ‘quatre epices’? /
37 Which types of country use the fewest number of spices in cooking?
38 What might food aversions often be associated with?
39 Apart from spices, which substance is used in all countries to preserve food?