A man sees a butterfly.The butterfly tries to get out of （1）

its

its

（it） chrysalis （蛹）.The man cuts the chrysalis and the butterfly comes out easily.To his surprise，the butterfly is unable to fly. （2）

If

If

the butterfly doesn't struggle （掙扎）to get out of the chrysalis，it can't fly.The struggle develops the energy in the butterfly.Similarly，the challenges of life bring out the best in young people and prepare the ability to "fly".
    When people are young，meeting and overcoming challenges will make them strong and ready to free life.For successful people，the more challenges they have had，the （3）

more successful

more successful

（success） they are.One famous man，who now owns many big （4）

factories

factories

（factory），sold socks from door to door when he was young.Another successful man is Eric.He set up a college at （5）

the

the

age of 30.His father died when he was only 16.He worked hard in the day and （6）

studied

studied

（study） hard at night.His father's （7）

death

death

（die） forced him to grow up fast.He took up the challenges and overcame them.Today，not only he himself but also his brothers and sisters are leading successful lives.
    Nowadays，some parents and teachers encourage young people （8）

to face

to face

（face） challenges.It is important （9）

for

for

them to learn to meet challenges and overcome them bravely.