2021年英语二考研的答案如下：
Part A：Reading Comprehension
1. Passage 1：A
2. Passage 2：B
3. Passage 3：D
4. Passage 4：C
Part B：Translation
1. The rapid development of technology has greatly facilitated our daily lives.
2. It is crucial to maintain a healthy lifestyle to ensure our physical and mental well-being.
3. In the face of challenges, we should always keep a positive attitude.
4. Continuous learning is essential for personal and professional growth.
Part C：Writing
1. Paragraph 1：The advantages of online learning include flexibility, convenience, and cost-effectiveness.
2. Paragraph 2：However, online learning also has its drawbacks, such as the lack of face-to-face interaction and potential distractions.
3. Conclusion：In conclusion, online learning is a double-edged sword, and it is important to weigh the pros and cons before making a decision.
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