In many fields youngsters are changing the world. Listed below are several influential young people．
Muzoon Almellehan, 19
Millions of children live in refugee camps（难民营）, where few have access to school.Almellehan experienced these conditions firsthand after fleeing Syria. Fighting to change that, she travels the world to tell people about the significance of education. Almellehan, UNICEF's（United Nations International Children's Emergency Fund） youngest-ever goodwill ambassador now, plans to return to her homeland Syria finally．
Auli'i Cravalho, 17
The Hawaii native voiced the heroine in Disney's hit movie Moana. Now Auli'i is taking on a new role. She'll star on NBC's Rise, a drama about a high school theater department that lifts the spirits of a struggling steel town in Pennsylvania. Based on a true story, the show has strengthened her belief that young people can bring about real change．
Mikaila Ulmer, 13
Mikaila used to hate bees. She was stung（蜇）twice. But after learning honeybees are critical to the ecosystem and dying out, she developed a fascination with them. She was determined to help. Using her great-grandmother's recipe, Mikaila made a mixture, sweetened with local honey. She sold it at community business fairs,do nating 10% of her profits to honeybee-advocate groups. Mikaila also runs a nonprofit group called the Healthy Hive Foundation, whose goal is to raise awareness about the hardship of the honeybee．
21. What did Auli'i Cravalho learn from the drama Rise? ______
A. High school theater department can help the steel town．
B. She can voice any kind of NBC drama in the future．
C. Young people indeed have the ability to make a difference．
D. She has the ability to take up acting as her lifelong profession．
22. Mikaila began to do business with the purpose of ______．
A. making money to help people in need
B. putting her great-grandmother's recipe to good use
C. developing a traditional technique for producing honey
D. rescuing the endangered but beneficial honeybees
23. What do the three young people have in common？
A. They're leading a wealthy and full life．
B. They've much influence on the world．
C. They are commercially successful．
D. They have no interest in academic subjects．
