Question 21 is based on the passage you have just heard.

​​​​​​​听力原文

    Good morning. Today, (21) [I would like to talk to you about my charity ReBicycle.] But before that, let me introduce someone. This is Leila Rahimi. She was so scared when she first moved to New Zealand that she struggled to leave the house, and would spend days working up the courage to walk to the supermarket for basic supplies. After a few months of being quite down and unhappy, she was invited to join a local bike club. (19) [At this time, ReBicycle got involved and gave Leila a second-hand bicycle. Within weeks, her depression had begun to ease as she cycled.] The bicycle totally changed her life, giving her hope and a true feeling of freedom.

    (20) [To date, ReBicycle has donated more than 200 bikes to those in need, and is now expanding bike-riding lessons as demand soars.] With a bike, newcomers here can travel farther, but for almost no cost. The 3 hours a day they used to spend walking to and from English language lessons has been reduced to just 1 hour.  

    (21) [Our bike-riding lessons are so successful that we are urgently looking for more volunteers.] Learning to ride a bike is almost always more difficult for an adult, and this can take days and weeks rather than hours. So if any of you have some free time during the weekend, please come join us at ReBicycle and make a difference in someone’s life.  

21. What do we learn from the passage about ReBicycle?

解析：B。录音开头讲话者就说到：我今天要谈谈我所在的慈善组织ReBicycle，由此可知ReBicycle是一家慈善组织。B项与此表述一致，charity为原词复现，故正确答案为B。本题为主旨题，录音开头句即为文章主旨，通过录音后面提到的donated和volunteers也可推知ReBicycle是一家慈善组织。

错项排除：录音中间提到了English language lessons，但这里说的是人们有了自行车，去上英语课所花费的时间减少了，和语言学习没有关系，故A项错误。C项中的counseling center在录音中未提及，故排除。录音中多次出现bicycle、bike-riding lessons以及cycled，但这只是说ReBicycle这家慈善机构通过捐赠自行车和教人们骑自行车来帮助他们出行，和体育俱乐部没有关系，故D项错误。