2012年考研英语一真题答案如下：
第一部分：阅读理解
1. Passage 1：答案：D
2. Passage 2：答案：C
3. Passage 3：答案：B
4. Passage 4：答案：A
第二部分：完形填空
答案：CABDACEBEFDBGCDGGBD
第三部分：翻译
1. The project, which was expected to be completed in two years, has been delayed by a year due to unforeseen difficulties.
2. With the rapid development of technology, the world is becoming smaller and smaller.
3. It is widely believed that exercise is beneficial to both physical and mental health.
4. The government has taken measures to ensure the safety of the public.
第四部分：作文
（此处省略作文内容，具体答案需根据考生实际作文内容进行评判。）
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