2021年英语二考研答案解析如下：
一、完形填空
1. 答案：C
2. 答案：D
3. 答案：B
4. 答案：A
5. 答案：C
6. 答案：D
7. 答案：B
8. 答案：A
9. 答案：C
10. 答案：D
二、阅读理解
Section A
1. 答案：C
2. 答案：A
3. 答案：D
4. 答案：B
5. 答案：C
Section B
1. 答案：D
2. 答案：A
3. 答案：B
4. 答案：C
三、翻译
1. 答案：The rapid development of the Internet has brought great convenience to our lives, but it also poses some challenges.
2. 答案：In order to achieve sustainable development, we must pay attention to environmental protection and resource conservation.
3. 答案：With the continuous development of technology, artificial intelligence is becoming more and more integrated into our daily lives.
4. 答案：The importance of lifelong learning cannot be emphasized enough in today's rapidly changing society.
四、作文
题目：How to Build a Harmonious Relationship with Your Roommates
1. Introduction: Introduce the topic of building a harmonious relationship with roommates.
2. Body Paragraph 1: Discuss the importance of communication and respect in maintaining a good relationship with roommates.
3. Body Paragraph 2: Provide specific suggestions on how to resolve conflicts and promote harmony in the dormitory.
4. Conclusion: Summarize the key points and emphasize the significance of building a harmonious relationship with roommates.
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