Najlepsza Odpowiedź!
We were invited to take part in a survey.We were asked about our pets and favourite subjects.We were even measured.Information about teenagers are collected by the researchers and are published in the newspapers.It is used to comparisons by people.It is known, for example, that 15-year-boys in 1830s were 23cm smaller than 15-year-boys today.We were all surprised.
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