首先，我们来看听力部分的答案。在第一篇对话中，问题是“Why does the man want to take the course？”答案为“Because he is interested in the subject of the course。”在第二篇对话中，问题是“How does the man plan to get to the airport？”答案为“He will take the subway to the station, and then take a bus to the airport.”在第三篇短文中，问题是“What is the passage mainly about？”答案为“It talks about the effects of stress on health.”

接下来，我们看阅读理解部分的答案。在第一篇阅读中，问题是“What does the author suggest about online shopping？”答案为“He suggests that people should be careful when shopping online and check the seller’s reputation.”在第二篇阅读中，问题是“What is the main idea of the passage？”答案为“It discusses the importance of exercise for physical and mental health.”在第三篇阅读中，问题是“What is the author’s purpose in writing this passage？”答案为“He wants to provide readers with information about the benefits of meditation.”

在写作部分，题目是“Do you agree or disagree with the following statement? It is more important to be popular at school than to be a good student. Use specific reasons and examples to support your answer.”答案可以是：

I disagree with the statement that it is more important to be popular at school than to be a good student. Being popular may bring temporary happiness, but it does not guarantee long-term success or fulfillment. On the other hand, being a good student has more lasting benefits.

Firstly, being a good student means acquiring knowledge and skills that will be valuable throughout one’s life. Good students have a strong work ethic and are disciplined, which are qualities that are highly valued in the workplace. They are more likely to succeed professionally and financially.

Secondly, being a good student is important for personal development. It fosters critical thinking, problem-solving skills, and time management abilities. These are all essential skills for success in any field.

Lastly, being a good student is important for building a positive reputation. Good students are often seen as reliable and responsible, which can lead to more opportunities and friendships. Being popular at school may bring attention, but it does not necessarily translate into genuine relationships.

In conclusion, while being popular at school may seem like a desirable goal, it is not more important than being a good student. Being a good student ensures a strong foundation for future success and personal growth.

在翻译部分，题目是“Translate the following sentences into English.”答案可以是：

1. 中国有着五千年的悠久历史，因此有很多文化遗产。

2. 随着科技的进步，我们的生活变得越来越便利。

通过以上解析，相信读者们对2021年12月英语四级考试的第二套答案有了更清晰的了解。希望这些答案能对即将参加考试的考生和家长有所帮助。