It is well-known to us that...（我们都知道……） / As far as my knowledge is concerned, ...（据我所知……）

Recently, the problem of... has been brought into focus.（最近，……问题引起了关注。） / Nowadays there is a growing concern over...（现今，……问题引起了关注。）

With the rapid development of science and technology, more and more people believe that...（随着科技的迅速发展，越来越多的人认为……）

It is a common belief that...（人们普遍认为……）

In my opinion, we should pay more attention to...（在我看来，我们应该更加关注……）

As for me, I prefer...（至于我，我更喜欢……）

There is an old saying that...（有句老话说……） / It is the experience of our forefathers, however, it is correct in many cases even today.（这是我们祖先的经验，然而，即使在今天，它在许多情况下仍然是正确的。）

One of the universal issues we are faced with is that...（我们面临的一个普遍问题是……）

In the past few years, there has been a boom/sharp growth/decline in...（在过去的几年里，……经历了突飞猛进/迅猛增长/下降。）

What calls for special attention is that...（需要特别注意的是……）

这些句型可以帮助你在专四作文中写出更高级、更吸引人的开头，从而提高你的作文分数。建议你在写作时根据具体主题选择合适的句型，并确保句子结构清晰、表达准确。