英语优缺点作文的开头可以采用以下几种方式：

引入话题

"As we all know, the world develops more quickly than before. Many students use the mobile phone in the school. Now, let me tell you the advantage and the disadvantage."

提出问题

"Do you think that it is good to be famous？ What are the pros and cons of such a life？ Is being famous really good？"

自我描述

"Everybody has strengths and weakness. I am a friendly, warm-hearted, generous, and easy-going girl. I am always ready to help others. I work hard every day and I am good at nearly all the subjects except..."

强调重要性

"It’s important to know our goodness and badness."

具体情境

"In the平时的 study, work, or life, everyone has written an essay. Writing essays is an important means to cultivate observation, association, imagination, thinking, and memory."

这些开头方式可以根据具体的作文主题和写作目的进行选择，以确保文章能够顺利引入并吸引读者的注意。