When most of us get a text message on our cell phone from an unknown person, we usually say "sorry, 1number!" and move on. But when Dennis Williams 2a text that clearly wasn't intended for him, he did something 3.

    On March 19, Dennis got a group text 4 him that a couple he didn't know were at the hospital, waiting for the 5of a baby.

    "Congratulations! But I think someone was mistaken," Dennis6. The baby was born and update texts were 7 quickly from the overjoyed grandmother, Teresa. In her 8, she didn't seem to realize that she was 9 the baby's photos with a complete stranger. "Well, I don't 10you all but I will get there to take pictures with the baby," replied Dennis before asking which room the new 11were in.

    Much to the family's surprise, Dennis stuck to his 12 ! He turned up at the hospital 13 gifts for the new mother Lindsey and her baby boy. Lindsey's husband was totally 14 by the unexpected visit. "I don't think we would have randomly invited him over but we 15 it and the gifts."

    Teresa 16 a photo of the chance meeting on a social networking website 17 by the touching words: "What a 18 this young man was to our family! He was so 19 and kind to do this." The post has since gained the20 of social media users all over the world, receiving more than 184,000 shares and 61,500 likes in just three days.

    Several weeks ago, I had a dinner party. During the1 a glass of red wine was dropped on a very fancy, Persian carpet in the living room. Later, when I planned to have the carpet2, experts came out. They 3 that they could not only get out the  4, but also make every carpeted room look and smell nice.

    After spending more than 200 dollars, my 5 looked great. All of the carpets were cleaned, but there was still one slight 6— the stain was still there, and to say I was 7, actually an understatement. Committed to getting rid of the stain, I 8 another expert. This was a real expert with great 9 in this trade. When he arrived and saw the stain, he immediately explained to me how 10 it would be to deal with the stain, and he wanted me to know that before he even unloaded his 11 to start the job. My expectation at that point was low; however, I told him to put in his best 12.

    In the first scenario（背景）I expected the stain to be  13. In the second I expected little or nothing. Those made me realize that in life the fine line between 14 and disappointment can be our expectations. Disappointment will occur 15 the expectation line drawn by ourselves is placed incorrectly. 16 good things will happen if you set your expectations 17. In the carpet cleaning scenario above, the second 18 not only set my expectations appropriately by under promising, but he also over delivered by getting the stain out—a result that 19 my expectations, making me very 20. So remember: set your expectations properly.

    It was the last day of the final examination in a large eastern university. On the steps of one building, a group of engineering seniors gathered, discussing the exam due to begin in a few 1. On their faces was confidence (自信). This was their last exam — then on to 2 and jobs.

    Some talked of jobs they already had; others talked of jobs they 3 get. With the certainty of four years of college, they felt ready and able to take 4 of the world.

    The coming exam, they knew, would be a(n) 5 task. The professor had said they could bring 6books or notes they wanted, requesting only that they did not 7 each other, during the test.

    8 they entered the classroom. The professor passed out the papers. And smiles 9 on the students' faces as they noted there were only five essay-type questions.

    Three hours had passed 10 the professor began to collect the papers. The students no longer looked confident. On their faces was a frightened expression. Papers in hand, no one spoke as the professor faced the class.

    He looked at the 11 faces before him, and then asked, "How many completed all five questions?"12 a hand was raised.

    "How many answered four?" Still no hands.

    "Three? Two?" The students moved restlessly in their seats.

    "One, then? Certainly somebody finished 13."But the class remained silent.

    The professor put down the papers. "That is exactly what I 14," he said. "I just want to impress upon you that, 15 you have completed four years of engineering, there are still many things about the 16you don't know. These questions you couldn't answer are relatively 17 in everyday practice." Then smiling, he added, "You will all 18 this course, but remember — even though you are now college graduates, your education has just 19."

    The years have 20 the name of this professor, but not the lesson he taught.

    Three years ago, when I entered my school for the first time, I was welcomed by students wearing white shirts with a badge (徽章) saying "Prefect" on them, who greeted me with the1"Welcome to Huaxia Middle School". I was immediately impressed and2 I could be one of them. Then next year, in the summer of 2016, my wish3 when I was selected to be a prefect. Just like the ones4 me, I was to stand at the school gate and 5 new freshmen.

    So, you may wonder, what 6 is a prefect? Prefects are student leaders in our school. They're usually top students7 from higher grades to help teachers run the school 8 of the classroom9 you're chosen to be a prefect, you need to be a nearly perfect student. Becoming a prefect wasn't10 for me. I used to be sensitive and 11 caring too much about what others thought of me. But since I was12 to become a prefect, I tried my best to be more brave and hardworking, making rapid13in a year.

    The biggest benefit of being a prefect is that it teaches me to be14 and set an example for lower grade students. I was a member of the school soccer team, but I wasn't a good 15 and felt embarrassed about my poor 16. After having some students from lower grades join our team, however, I knew that I had to set a good example. So, I kept practicing my skills and 17 greatly.

Being a prefect doesn't 18 mean I have a badge on my shirt. It also means that I have a hardworking attitude deep in my19"You can make it," I always remind myself. Becoming a prefect has20 me to work harder and become an even better person.

    Even though it was only October, my students were already whispering about Christmas plans. With each passing day everyone became more 1, waiting for the final school bell. Upon its2  everyone would run for their coats and go home, everyone except David.

    David was a small boy in ragged clothes. I had often 3 what kind of home life David had, and what kind of mother could send her son to school dressed so 4for the cold winter months, without a coat, boots, or gloves. But something made David 5. I can still remember he was always6 a smile and willing to help. He always 7after school to straighten (使变直)chairs and mop the floor. We never talked much. He 8just simply smile and ask what else he could do, then thank me for letting him stay and slowly9home.

    Weeks passed and the 10over the coming Christmas grew into restlessness(骚动) until the last day of 11 before the holiday break. I smiled in 12as the last of them hurried out the door. Turning around I saw David 13standing by my desk.

    "I have something for you" he said and 14from behind his back a small box.15it to me, he said anxiously, "Open it" I took the box from him, thanked him and slowly unwrapped it. I lifted the lid (盖子)and to my 16saw nothing. I looked at David's smiling face and back into the box and said, "The box is nice, David, but it's 17."

    "Oh, no, it isn't" said David. "It's full of love. My mum told me before she died that love was something you couldn't see or touch unless you know it's there."

    Tears filled my eyes 18I looked at the proud dirty face that I had rarely given19to. After that Christmas, David and I became good friends and I never forgot the meaning 20the little empty box set on my desk.

    I remember when my husband started coaching the basketball team at a local high school in Richmond, California. He had a(n)1for sports and loved working with kids. Sitting in the stands during the first game, I cried 2joy as I watched him interact with the students. He seemed to3.

    On the car ride home, we both realized that he has a gift for4. Not just on the5, but also in the classroom. He6a well-paid job in finance, and went back to school to7his teaching certification. He landed a job teaching 8^th grade US history to the amazing kids at Helms Middle School in San Pablo, California. He had found his occupation. Little did I know that I would be in the8, too.

    My husband knows that I work for a software company that does stuff with 3D printing and that we get free tickets to Maker Faire(创客节), but that's usually the extent of his interest m my profession. So I was9when he asked me to be a(n)10speaker in his class that first year.

    11I was planning my first lesson for his students, I asked myself, "What should I do? How do I integrate(融入)12, modeling and 3D printing into 8^th grade US history?" I13my friends from Make magazine, read the local teacher blogs and thought I was14to go. But a15thing happened during my first lesson: I kind of failed. The end result, 16, was better than I ever17.

    At the end of the class, I asked the students how they felt about what18had just learned. They raised their hands and19answers and sought me out to more questions. When the bell rang, they thanked me for my20.