Advocates of …proclaim that…
… 的支持者声称…

Some people think that… To be frank, I cannot agree with their opinion for the reasons below.
有人认为… 老实说，我不同意他们的意见，原因如下:

Nowhere in the world has the issue of…been more popular than…
这里…的问题（or事件，事情）是世界上最热（or流行）的。

One of the great men once remarked that…Now more and more people share this belief.
一位伟人曾经说过… 现在越来越多的人持此观点。

For years,…has been seen as… But things are quite different now.
有好几年，…一直被视为… 但今天的情况大不相同了。

Now, it is commonly believed that… Such people think… But I wonder whether…
现在人们普遍认为… 这些人认为… 可是我拿不准是否…

Despite the arguments above, I prefer… to…
尽管上面举了些证据，可我还是更喜欢…

I believe that the title statement is valid because…
我认为题目的表述很正确，因为…

I agree with the above statement because I believe that…
我同意上面的论述，因为我觉得…

Consequently I have to agree that…
最终，我不得不同意…

I find the statement of …to be too narrow
我觉得… 的陈述很肤浅。

For my part, I am….
就我而言，我…

As far as…are concerned, however, I prefer…
就… 而论，我还是更喜欢…

I support the second system
我赞成第二个体系

Yet I am one of many people who feel that…
可是，很多人感到… ，我是其中之一。

Generally, I prefer to…
总体而言，我较喜欢…

As a general rule, I prefer to…
总体而言,我更喜欢(更乐于)....

I cannot entirely agree with the idea that…I believe.
我不完全同意...的观点

When it comes to…,most people believe that…,but other people regard…as…
至于(谈及)...,大多数人认为...,但也有人把...视为....

No view is more dangerous now than the one that…(which)is generally held by…
一般人所持的....的观点(想法)是现今最危险(有害)的.

No belief is so undesirable as the one that…(which)is commonly held by…
这个被...一般所信仰的观念(观点)是最不受欢迎的(令人讨厌).