练习一：

　　Directions: For this part, you are allowed thirty minutes to write a composition on the topic What Would Happen If There Were No Power in three paragraphs. You are given the first sentence or part of the first sentence of each paragraph. Your part of the composition should be no less than 120 words, not including the words given.

　　What Would Happen If There Were No Power

　　1. Ever since early last century, electricity has become an essential part of our modern life. ______________________________________________.

　　2. If there were no electric power，_________________________________, ____________________________________________________________.

　　3. Therefore, ___________________________________________________.