GRE写作的主题句需要简单明了直击关键，要能够让读者轻松明白你的观点。对于GRE写作主题句，我们可以有如下参考写法：
No one would deny the fact that the importance of A to X should never be overlooked.
The fact that A is of vital importance to X is hardly a surprise.
There is no denying that A is conducive to X or A is closely bound up with X.
On no account should we underestimate the importance of A to X.
By no means are we supposed to close our eyes to the importance of A to X.
It is A that plays an essential part in X.
What we have to admit is that A is a major contributor to X.
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GRE写作的主题句需要简单明了直击关键，要能够让读者轻松明白你的观点。对于GRE写作主题句，我们可以有如下参考写法：
No one would deny the fact that the importance of A to X should never be overlooked.
The fact that A is of vital importance to X is hardly a surprise.
There is no denying that A is conducive to X or A is closely bound up with X.
On no account should we underestimate the importance of A to X.
By no means are we supposed to close our eyes to the importance of A to X.
It is A that plays an essential part in X.
What we have to admit is that A is a major contributor to X.