It is certain that one important criterion for employment is having 'leadership'.

I think it is certain that there is intelligent life in this universe, but the likelihood of that life coming to Earth is practically nil.

The thief has to be in here. I'm sure somewhere around is his stronghold so if we can just find that we've got him.

No worries, I'm sure it will be a perfect fit for you!

It is certain that the increase of divorce will lead to anxiety between couples, parents and children.

This bill is safe to pass.

The plane could easily be late.

I'm quite sure of her success.

Her passing the exam is a sure thing.

There can be no doubt about their marriage.

He will without doubt succeed in the exam.

I'm sure he is holding back something from us.

He promised to return the money without fail.

He will not fail to pay it.

There is no doubt that his sons are good boys.

I have no doubt that he will succeed.

There is no doubt that his sons are good boys.

He can be trusted.

That he is innocent is quite certain.

There is no question that he will marry her.