阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
A
A 23yearold woman has achieved an unbelievable thing that many of us dream of—visiting every country on Earth．
Lexie Alford was born into a family of travel agents, which gave her the opportunity to tour places such as Cambodia, Dubai and Egypt during her childhood, according to Forbes magazine． She began saving up at age 12 to fund her goal of visiting all countries． By her 18th birthday, she had travelled to 72 nations． In October 2016 she realized she could see the remaining nations on her list in time to set official record． Many people follow her travels on social media platform Instagram and she decided to chase the world record partly to inspire others． “Honestly, in the beginning, I simply wanted to push the limits of what I thought I could do with my life and see as much of the world as possible in the process，” she told Forbes． “It wasn't until things started getting really challenging that I realized I was inspiring people around me, especially young women．”
“I also loved visiting Northern Pakistan, the natural beauty of the mountains and kindness of the locals was astonishing，” Lexie Alford said． “The most pleasant surprise about travelling to all these misunderstood areas of the world was that the countries for which I had least expectations ended up being the most amazing．”
“My advice for young people is to believe that you can do anything you set your mind to do． If you want to travel, you have to prioritize(优先处理)it over other aspects of your life．”
21．Why was Ms． Alford able to tour lots of places when she was a child?
A．Because social media platform supported her．
B．Because she had the courage to accept challenges．
C．Because her family background gives her an advantage．
D．Because some travel agents helped her．
22．What amazed her most about the travel?
A．Traveling to the misunderstood places．
B．The natural beauty of the mountains．
C．The kindness of the local people．
D．The unexpected wonderful experiences in some countries．
23．Which of the following can best express her advice for young people?
A．Rome was not built in a day．
B．Where there is a will, there is a way．
C．Where there is life, there is hope．
D．Don't put off till tomorrow what can be done today．
