How well she could keep such an important secret!

He had not even been told about the Government's most important secret: the construction of the atomic bomb.

There was an important secret involved somewhere in that question, he thought.

Yes, he and the Boys had some important secret to discuss.

But some of the world's most important secrets are about war.

True, he hadn't been trying to carry away any important secrets.

Both them keep important secrets that will change their lives when they're revealed.

I won't make him tell me his people's most important secret.

And so I'm going to trust you with the most important secret of my life.

But he said other elements of the files did hold important secrets.