1．

A．method B．other than C．destination D．unique E.amazing F.cut

This four-day walking tour will take you on（1）paths through the Andes Mountains on the way to the city of Machu Picchu.After reaching your（2），you will have a day to explore and be amazed by this ancient city.Especially amazing is the Incas' dry stone（3）.of building.Inca builders（4）stones to exact sizes so that nothing was needed to hold walls together（5）the perfect fit of the stones.

2．    Heated （1） （argue） and cold silences are common between teenagers and their parents， （2） is because teenagers usually go through physical and mental changes in their growth.They have a strong desire for independence as well as their parents' love and support.It can be a tough challenge for them （3） （achieve） a balance.
    It must （4） （stress） that they can improve the situation by communicating （5） （regular） in an honest way.The key to （6） （maintain） a good parent-child relationship is to understand the situation from each other's point of view.Whenever quarrels come about，teenagers must remember that perhaps their parents （7） （experience） something similar and their advice is quite （8） （benefit）.
    The good news is （9） the stormy period will not last long.Everything will turn （10） fine in the end.

3．

A．willing B．educated C．pushing D．generation E.teenagers F.volunteer

Does the face-down（1）need a hands-up？Well，probably not.The fact is that many of today's teenagers are better（2）and more creative than past generations.They also seem to be enthusiastic and（3）to become leaders.More young people than ever（4）to help their communities.There are also brave young people such as Malala Yousafzai，the teenager who won the 2014 Nobel Peace Prize for（5）girls' rights to go to school.