In this connection
In this point of view, doubtless
In this situation, let us
In this respect they are
In view of these facts, I say
In what I have to say
Is it fair to say that
Is it not evident that
Is it not quite possible that
Is it said that
Is not that the common sentiment?
Is there any reason for
It affords me unusual pleasure
It is but too true that
It can scarcely be imagined that
It can not be too often repeated
It certainly follows, then,
It does not appear to me
It has been maintained that
It has been more than hinted that
It has been said, and said truly,
It has sometimes been remarked that
It is a common observation that
It is a curious fact that
It is a fact patent to any one that
It is a melancholy fact that
It is a notorious fact that
It is a thing commonly said that
It is a very serious matter.
It is a very serious question