—You'd better use mobile payment. I don't care _________it is Ali Pay or WeChat Pay.

—Yes. Just as President Xi says, “Happiness is achieved through hard work.”

—No idea. He didn't _________his parents in the letter. 

    I know a Catherine who is smart, educated and interesting. But I avoid her because she never 1 complaining(抱怨)! For years, I fought against my feelings, because I really like and admire(赞赏) her, but I've found I just can't be her friend. Her world is 2“but.”. The trip would have been nice, but the drive was too long.  The food was good, but the light of the restaurant was too  3.  The hotel was too hot, the bed hurt her back and the room service was too slow. Her complaints were 4 changing me.  Months ago, my best friend Daisy was listening to me complaining about Catherine 5 she just became really angry. “Either break up with her, or leave me alone.” She shouted at me, “I'm tired of listening to your complaining. ” Her honesty surprised me, and I began to keep myself away from Catherine. Later, I did 6 her.

    Now I try to remain happy and positive (积极的) about life, and find friends of the same. There's been scientific research lately. It shows that people who find 7 to be thankful for their lives are actually happier, and I believe that is true. Endless complaining seems to control your life if you let it come into your brain. And too much complaining will actually make your life 8.

    Some people take “gratitude ( 感激之情) walks” every day, where they 9their lives in a positive way. By developing a grateful attitude, you can be turned away from what's troubling you, and 10 what makes you happy. Then you will have a beautiful life. 

    My mother is a teacher, and I grew up with the challenges (挑战) a teacher faces. I often asked her, “Why do you teach?  What keeps you teaching? ”The answer was always the same. “There is always that one child, that one moment that is worth it. ”

    Now, I am a teacher, too. But different from my mother, I teach students challenging activities outdoors. And when my mother asked me the similar questions, my answer was, “It's that one child, that one special moment.”

    One of those moments happened recently. I was working with a group of girls in a four-week programme. Everything went on well through the “Team” events and we were moving on to a “High” one called the Wire(钢索) Walk.

    In the Wire Walk, each girl had to climb up the pegs(木桩) in a tree to a wire, 8 meters high, and then walk across it. Of course, everything was safe for sure. When I asked who would try, a few girls raised their hands, and they finished the Wire Walk with little difficulty.

    But when it was Susie's turn, it seemed that she didn't really want to. I asked Susie if she was ready. She answered softy, “I suppose.”

    Now, Susie was at the foot of the tree. She started to make the long reach for the first peg. The other girls cheered for her. Then I found Susie was becoming nervous with every step. I realised she would not go much further.

    Susie was halfway up. Then she stopped and held the tree tight(紧紧地),  looking very afraid. Her eyes were closed. With her face against the tree, she cried, “I can't.”

    The other girls sat in silence. I talked quietly to Susie, trying to relax her. I talked for a long time till I ran out of words.

    “I will still be your friend no matter what, Susie!” Mary broke the silence.

    To my surprise, Susie lifted her head and looked up to the wire. Then she turned to look down at Mary and smiled. Mary smiled back.

    Finally, Susie made it all the way across that wire. When she returned to the ground, the first hug she looked for was from Mary.

    We all cheered.

    Moments like this keep me doing what I do. The young hearts continue to fill me with courage.