Puberty（青春期）is the stage of life when young people leave childhood and head into adulthood.It is a difficult process for teenagers because it has an effect on both their bodies and minds.They need to understand what is going on with their bodies，how to deal with those changes and how to start taking responsibility（責(zé)任）for themselves.
    A young person may begin puberty at 8，while another may not start puberty until 14 or 15.In general，girls start puberty before boys do.For both girls and boys，it is usually complete by the age of 18.
    During these years，the body develops in many ways.Feeling will also change quickly.
    Teenage boys at this stage often begin to take unnecessary risks.Their focus is on having fun and being accepted by others.They need to think before they act and make good decisions for themselves.
    A girl's personality often does not develop in the same way as a boy's.Teenage girls sometimes lose confidence in themselves.They are no longer certain about their own feelings.Yet they are usually afraid to tell their parents or teachers about their problems.For this reason，teenage girls should be encouraged to talk about things with trusted adults.
    Parents，schools and communities can do a lot to care for and help young people.It is their responsibility to make sure that young people grow into healthy adults.

（1）Why is it difficult for teenagers to experience the stage of puberty？

Because puberty has an effect on both their bodies and minds.

Because puberty has an effect on both their bodies and minds.

（2）According to the passage，when does Jane probably begin puberty if her brother Tony begins at 15？

Jane probably begins puberty before 15.

Jane probably begins puberty before 15.

（3）What do boys focus on at the stage of puberty？

They focus on having fun and being accepted by others.

They focus on having fun and being accepted by others.

（4）How do girls feel about themselves at the stage of puberty？

Teenage girls sometimes lose confidence in themselves.They are no longer certain about their own feelings.

Teenage girls sometimes lose confidence in themselves.They are no longer certain about their own feelings.

（5）Who does the author call for to care for and help young people？

Parents，schools and communities.

Parents，schools and communities.