英语A级作文是许多学生必须要应对的考试，而在写作过程中，开头和结尾是非常重要的部分。下面是一些关于英语A级作文万能句子开头和结尾的摘抄。

开头句子：

1. It is widely known that…

2. Nowadays, more and more people have realized that…

3. In recent years, there has been a growing concern about…

4. With the development of society, people are becoming more and more aware of…

5. In the past few decades, there has been a significant increase in…

结尾句子：

1. In conclusion, it can be said that…

2. All in all, it is clear that…

3. To sum up, we can see that…

4. In summary, the evidence suggests that…

5. Therefore, it is crucial that we take action to…

以上这些句子可以帮助学生在写作时更好地展现自己的思路和观点，同时也可以提升文章的整体质量。但是，需要注意的是，这些句子只是起到辅助作用，并不能完全替代自己的思考和表述。因此，在写作时，还需要注重语言的准确性和逻辑性，才能取得更好的成绩。