According to Frank, why do ids get violent?

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1 How can we prevent juvenile crime?

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2 听下面一段材料，回答题：What didn't the man get from the conversation?

A． A postcar

B． A questionnair

C． Free samples of finned mea

D． Some wor

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3 Why the man insists on filling out the questionnaire right away?

A． Because they have promised to do s

B． Because he doesn't like the sampl

C． Because he wants more free sample

D． Because he wants to mail it on his way to wor

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