题目内容：

    What is the greatest thing in the world? It is a smile. A smile can start a 1.(友谊) and make us feel warm and joyful.

Last year when I 2.(进入) a new school as a middle school student, I had no friends and felt 3.(孤独的).

One day, when running in the playground, I was tripped by a stone and fell onto the ground. I tried to stand up but couldn’t because my knee 4.(受伤) badly. I felt so bad but then a hand came into my sight. As I looked up, I saw a big smile. It was from my new classmate Leo. I grabbed the hand without thinking 5.(两次) and stood up. From then on, Leo and I became good friends.

 6.(然而), even best friends argue sometimes. Leo and I are no exception. Last week after arguing, I went home. That night after calming down I 7.(后悔) my bad temper. But I was embarrassed to talk to Leo. After sending an emoji of a smile to Leo’s mobile phone, I waited and was 8.(担忧的) Leo would never talk to me again. Then I heard the ring of a video chat and when I accepted the chat, I saw a face with a big smile on the screen. I was really 9.(感动的).

You can see how great the power of a smile is. Try to give other people a smile every time and you will  10.(改善) the world!