一个青少年可能会经历快速的身体和情感变化。
An ___adolescent may experience rapid physical and emotional changes.
许多青少年都很隐秘。
Many ___adolescents are secretive.
儿童成长为青少年，拥有更多自由但也承担更多责任。
Children become ___adolescents with more freedom and yet more responsibilities.
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