Samantha "Sammi" Janower

　　Samantha "Sammi" Janower, now 18 years old, was told 15 years ago that she had cancer. Chemotherapy (化疗) is the only option, so Sammi underwent (经历) 15 months of chemo at the age of three. Today, her dad says the cancer survivor is determined to help other kids avoid having to go through what she has gone through. To that end, in 2017 her team of cyclists, Team Samantha, raised more than $327,000 for the hospital that saved her life by riding 192 miles in the Pan-Mass Challenge (PMC), a bike-a-thon across their home state of Massachusetts. One hundred percent of every dollar raised goes directly to the doctors and research that work on cancers like hers.

Annika Viswesh

　　Eighth-grade student Annika Viswesh, who attends the Stratford School in Sunnyvale, California, became legally blind when she was just one year old due to a condition known as amblyopia (弱视). Various methods have helped to improve her sight over the years, but more than anything it was that very experience that pushed her to search for better ways to treat and manage the condition, which affects about 12 million children worldwide. So, she created the Oculus Patch Assistant which helps to simplify and improve the effectiveness of amblyopia treatment. She is now working with doctors at the Palo Alto Medical Foundation to conduct field testing.

Jahkil Jackson

　　Jahkil Jackson, 9, of Chicago, founded Project I Am to help the homeless in his hometown. Within the last year, he's collected and handed out more than 3,000"Blessings ( 祝福) Bags" filled with toiletry things, socks, and food. A frequent public speaker, Jahkil challenges children to find their enthusiasm and use it to make a difference."When I speak to other kids at schools and community centers, I always say,'Don't wait until you are an adult to be great,' "Jahkil said." 'You can be great now!' "

21. Why did Sammi found Team Samantha?

A. To improve medical conditions B. To raise money for herself

C. To support cancer research D. To attract cycling lovers

22. What did Annika make efforts to do?

A. Help the legally blind see better

B. Find a long-term treatment for amblyopia

C. Carry out several scientific studies at her school

D. Search for economical ways to treat her condition

23. What should kids do according to Jahkil?

A. Lend a hand to the homeless B. Take action and contribute

C. Take part in Project I Am D. Act like adults

　　From an early age, my daughter was a natural traveler. I remember being concerned about how she would handle the time difference when we traveled to Europe the summer after her kindergarten (幼儿园) year, but she hit the ground running. She woke early enough to catch the first train to Brussels. She wasn't afraid to try new food in Belgium or Greece.

My 10-year-old son, however, is not a traveler. He feels comfortable in familiar places, and