as is known to all that computers play an important role in many fields of our life

as is known to all that computers play an important role in many fields of our life （误）
改1：
As is known to all,computers play an important role in many fields of our life.
改2：
It is known to all that computers play an important role in many fields of our life.
改3：
What is known to all is that computers play an important role in many fields of our life.