Good writing usually contains a variety of sentence lengths to make the writing more interesting. Too many short sentences often make the writing choppy sounding.

　　Original: 原文：

　　It was my birthday. I knew there would be a party. There was something in the air. I was nervous, but excited. They didn’t disappoint me. I walked in my house. All my friends yelled, “Surprise.”

　　Improved: 修正版：

　　As it was my birthday, I had a feeling my friends would throw me a party. I wasn’t disappointed.

　　When I walked in my house, all my friends yelled, “Surprise!”

　　Original: 原文：

　　America has many important people. Benjamin Franklin was a “founding father.” He helped write the Declaration of Independence. He also invented many things. He invented bifocals. He invented the Franklin stove. He discovered electricity.

　　Improved: 修正版：

　　Benjamin Franklin, who was one ofAmerica’s“founding fathers,” helped write the Declaration of Independence. He also invented many things such as bifocals, the Franklin stove and he discovered electricity.