高考英语作文是一个重要的考试部分，它不仅考察学生的语言运用能力，还考察学生对社会热点问题的理解和分析能力。以下是2021年高考英语作文的12个热门话题及其预测的优秀范文。请注意，以下内容为模拟和示例性质，并非实际考试题目。

### 话题一：环境保护

**题目：**
假如你是李华，你校英语报正在举办以“环境保护”为主题的征文活动，请你写一篇短文投稿。

**优秀范文：**

*Title: Protect Our Earth*

As a senior high school student, I am deeply concerned about the environmental issues that our planet is facing. Global warming, air pollution, and deforestation are just some of the problems we need to address urgently.

Firstly, global warming leads to extreme weather conditions such as hurricanes and droughts. Secondly, air pollution from factories and vehicles affects not only human health but also wildlife. Lastly, deforestation results in loss of biodiversity and contributes to climate change.

To solve these problems, we must take action now. Governments should enforce stricter regulations on industrial emissions and promote renewable energy sources like solar and wind power. Individuals can contribute by reducing their carbon footprint through recycling, using public transportation, and conserving water and electricity.

In conclusion, protecting our environment is everyone's responsibility. Let us work together to ensure a sustainable future for generations to come.

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### 话题二：健康生活方式

**题目：**
假设你叫张明，你的朋友小李最近因为学习压力过大而忽视了健康，你给他写了一封信，建议他培养健康的生活方式。

**优秀范文：**

*Title: Live a Healthy Life*

Dear Xiao Li,

I hope this letter finds you well. I've noticed that you've been under a lot of stress lately due to your studies, which has led to neglecting your health. It's important to remember that a healthy body is essential for a productive mind.

I suggest incorporating regular exercise into your daily routine, such as jogging or yoga, to help reduce stress levels. Additionally, eating a balanced diet with plenty of fruits and vegetables will provide your body with the nutrients it needs to function properly.

Remember to get enough sleep each night, as lack of sleep can affect your concentration and overall well-being. Lastly, don't forget to take breaks during study sessions to clear your mind and recharge.

Taking care of yourself is not selfish; it's necessary. By adopting a healthier lifestyle, you'll be able to perform better academically and lead a happier life.

Yours sincerely,
Zhang Ming

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以上只是两个示例，实际考试中可能会有其他不同的主题。准备高考英语作文时，除了掌握这些话题外，还需要注重词汇积累、语法正确性和逻辑性。希望这些示例能对你有所帮助！