阅读下面短文，从每题所给的A、B、C、D四个选项中，选出能正确回答所提问题或完成所给句子的最佳答案。

     Sixteen years ago, a boy gave me an important gift. It was a smile.

      It was the early autumn of my first year at a middle school, and my old school was far away. As a result, no one knew who I was. I was very lonely, and afraid to make friends with anyone.

     Every time I heard the other students talking and laughing, I felt my heart break. I couldn't talk with anyone about my problems.

Then one day, my classmates were talking happily with their friends, but I was sitting at my desk unhappily as usual.  At that moment, a boy entered the classroom. I didn't know who he was. He passed me and then turned back. He looked at me, with a smile.

    Suddenly, I felt the touch of something bright and friendly. It made me feel happy and warm. That smile changed my life. I started to talk with other students and made friends. Day by day, I became closer to everyone in my class. The boy with the lucky smile has become my best friend now.

    One day I asked him why he had smiled, but he couldn't remember doing so!

     It doesn't matter because all the dark days have gone. I believe that the world is what you think it is. If you think it is lonely, you might always be alone. So smile at the world and it will smile back.

    Sometime ago I discovered that one of my chairs had a broken leg. I didn't think there would be any difficulty in getting it repaired, as there are a lot of antique (古董) shops near my home. So I left home one morning carrying the chair with me. I went into the first shop expecting a friendly reception.  I was quite wrong. The man wouldn't even look at my chair.

    The second shop, though a little more polite, was just the same, and the third and the fourth. I realized that my approach must be wrong so I decided to try another way. I entered the fifth shop with a plan in my mind.  I placed the chair on the floor and said to the shopkeeper, "Would you like to buy a chair? Twenty pounds," I said. "OK. I'll give you twenty pounds for it,"he said. "It's got a slightly broken leg," I added. "Yes, I saw that.  It's nothing," the shopkeeper replied.

    Everything was going according to the plan and I was getting excited. "What will you do with it?" I asked. "Oh, it will be easy to sell after the repair is done.""I'll buy it," I said.  "What do you mean? You've just sold it to me," the man asked in surprise.  "Yes, I know. But I've changed my mind.  I am sorry. I'll give you twenty-seven pounds for it." "You must be crazy," he said. Then, suddenly the penny dropped. He shouted, "I know what you want. You want me to repair your chair." "You're right,"I said, "And what would you have said if I had walked in and asked you to repair my chair?" "I wouldn't have agreed to do it. We don't do repairs, not enough money in it and too much trouble.  But I'll repair this for you.  Five pounds will be the cost,"the man answered. He was a very nice man and was greatly amused by the whole thing.

    When I was five years old. I took a boat out on the river and went fishing by myself. I really wanted to catch a fish! But they were not biting.

    I stayed in my boat for three days, waiting. A few times, I thought I felt a fish at the end of the line. The first time I pulled in my catch, it was not a fish; it was an old bag. The second time, it was a shoe. Finally, at the end of the third day, I felt a strong pull at the end of the line. The pull was so strong they my boat raced around and around. I needed all my power just to hold onto the fishing rod. I pulled, and I pulled and I caught the biggest fish that ever swam on the Earth! It was heavier than everyone in this room put together! Then something terrible happened!

    After I pulled the huge fish into my boat, I saw that the boat was going under water! Water was coming into the boat from all sides! I was not a very good swimmer, so I was scared.

    Although it was the hardest choice I ever made. I had to let the fish go. I pushed it back over the side of the boat, and we waved good-bye to each other as it swam away.

    The back door of the ambulance(救护车) was suddenly shut and the driver ran to the front, jumped into his seat, and started the engine. Inside were the1 parents, Mr. and Mrs. Green, the mother holding their baby daughter Ally. The little girl had 2 food stuck in her throat and could hardly breathe.

    The driver, Mr. White, 3 his siren (报警器) and flashing light, and started speeding towards the nearest hospital, fighting against4. The cars ahead of him pulled out of the way as he drove through the 5from the back of the 6 the parents were shouting at him to    7 , since Ally had almost stopped breathing. In front of him he saw some traffic lights, with the red "STOP" light shining. Mr. White knew that he had no time to 8 , so he drove straight past the traffic lights, looking to his left and right as he did so.

    Coming towards him from his right was a taxi. The driver had the windows 9, since the car was air-conditioned, and he was playing his radio. He did not10the ambulance. The lights were green, so he drove straight on into the path of the ambulance.

    Mr. White tried to stop his ambulance but it was too late. It hit the taxi. Everybody was shaken but no one was hurt. Mr. White looked to see how little Ally was. He was astonished to see relief instead of 11on the faces of the parents.

    "Look!" cried Mrs. Green. "She is 12again."

    "It must have been the crash." said her husband. "It 13 the food out of her throat." The baby's color was turning to14 , and she was crying in a loud but healthy 15.

    They were all joyful, and quite forgot about the accident, the taxi, and the lines of cars all around them.

Do you feel lonely(孤单的) when your best friend isn't in the same class? Here's our advice for you.

It's hard when a best friend isn't around— maybe because he or she moved to a different school or a different class. You may feel left out during break or lunchtime. You want to make new friends, but how do you find them? Maybe it seems like everybody has his or her own friends. But remember, there's always room(空间) for more friends.

Start by looking around your classroom— think about which kids you'd like to play with during break. Try saying hello to them, smile, and be friendly. Share something with them. Ask some classmates to play with you or say " Do you want to play together?" in the playground. When you're at break, walk to kids you want to play with, and say " Hi, can I join you?" or just join in them.

If you still don't know how to make friends by yourselves or if you're shy, ask your teacher to help you. Teachers are usually very good at finding people who need friends. The best way to make friends is to be a friend. Being kind, being friendly, sharing, saving nice things, giving other people— soon, you'll have one, or two, or more new friends.

Maybe you still miss your old friends. But when you see them again, you can share something you see recently. You can also introduce him or her to your new friends.

Why Are Tennis Scores So Strange?

One, two, three . . . Most sports have a pretty easy scoring system (计分系统), but tennis is a bit different. In each game, both players start with zero —called "love". After one person scores (得分), the point becomes 15. The next point is 30, then 40, and the following point wins that game. 

Some wonder why we do the points this way. Why not just "1, 2, 3, game Queen Wen," for example? Unluckily, we don't know much about the beginning of this scoring system. We only know that it was different. In the early days of the sport, the points were 15, 30, 45 not 40. A poem (诗歌) from the 1410s counted the points of a game between King Henry V of England and the French Dauphin (法国王储) as 15, 30, 45. This was easier to understand because every time one scored, it was by 15. 

But why do we give players 15 points when it's actually just a single point?  ★  One popular story says that the numbers have something to do with clocks. People may have felt that the four quarters of a clock were a good way to score the game. But not everyone is happy with that story. Some people point out that people didn't begin to use minute hands until the late 1500. 

You may find it strange to use "love" for a score of zero. Some believe that it came from the French word "L'oeuf" (the egg) - after all, the number zero looks like a duck or goose egg. Others like a more romantic idea about its beginning: Some people play tennis for love even if they don't win anything. 

No matter how strange the scoring system may be, tennis is enjoyed all around the world. Tens of millions play it, with even more watching it on TV or their phones. So, why not pick up your racket (or sit down on your sofa) and enjoy some fun with tennis?