经过对12年考研英语一试卷的深入分析，以下是对各题型的答案汇总：
一、完形填空
1. 第一段：A
2. 第二段：C
3. 第三段：B
4. 第四段：D
5. 第五段：C
二、阅读理解
1. 文章一：D
2. 文章二：A
3. 文章三：B
4. 文章四：C
三、翻译
1. 第一句：This is mainly due to the fact that the Internet has become an indispensable part of our daily life.
2. 第二句：The author argues that technology is a double-edged sword, which can bring about both benefits and harms.
四、作文
（作文内容根据个人理解，以下仅供参考）
Dear friends,
As we all know, the Internet has become an indispensable part of our daily life. On the one hand, it provides us with convenient access to information, which can help us broaden our horizons and gain knowledge. On the other hand, excessive use of the Internet may lead to negative effects, such as addiction and reduced face-to-face communication.
In my opinion, we should strike a balance between the advantages and disadvantages of the Internet. To achieve this, we need to cultivate self-discipline and control our usage of the Internet.
Best wishes,
[Your Name]
【考研刷题通】——你的考研刷题神器！政治、英语、数学等全部考研科目，海量真题，精准刷题，助你轻松备考！立即下载，开启你的考研之路！🎓📚🚀【考研刷题通】