A、When our friends tend to recall the past. B、When we don’t have to pay the bills. C、When we do not have any friends who underst

Hi, everyone! The old saying goes, "You’re only as young as you feel. "(23)But we live in a tough world. How can we possibly keep a youthful outlook on life when we have bills to pay, mouths to feed, and a roof to keep over our heads? While it’s true that we’ll certainly never be able to relive the carefree days of our childhood, we can live our lives to their fullest potential, and in doing so stay as fresh and invigorated as we were when we were young.
    Keeping good company will keep you socially happy and healthy throughout your life. On the other hand, nothing will drag you down more than socializing with people who hold you back from your full potential. Ironically, surrounding yourself with people who are intent on moving forward in life will keep you energized and make you feel as if you’re always in your prime.(24)It’s when you find yourself surrounded by toxic friends who live in the past that you realize you’re not getting any younger, and you’ll start to feel as if the best days of your life have passed you by.
    Saying someone is "old-fashioned" is just a nice way of saying they are behind the times. If you get into the mindset that you’re "too old" to learn something—like how to use Windows 10 or an iPhone you’ll certainly feel that you’re past your prime. We live in a world in which education and knowledge is literally at our fingertips, and it’s never been easier to pick up a new skill or hobby. Make it a habit to learn something new every day, and you’ll continue feeling sharp and ready to take on the world. Soon enough, you’ll be showing your children tips and tricks on the iPhone 6!
    When we were kids, we jumped in puddles, rolled down hills, and ate snowflakes falling from the sky. I’m not saying you, as a grown adult, should do these things habitually.(25)But you should never overlook the small things in life. Celebrate your good hair days. Feel victorious when you hit every green light on the way home from work. Actively look for things to enjoy in your life: no matter how much may be going wrong, there will always be something to smile about if you look hard enough.
    Hope you enjoy today’s lecture. Thanks for listening!
23. Why does the speaker say it is not easy to keep a youthful outlook on life?
24. When will we realize that we are old according to the speaker?
25. What does the speaker suggest people do at the end of the talk?