I'd like to run a series of tests to make doubly sure.

But he made doubly sure by pulling a few strings.

I can check at the same time, be doubly sure.

Because of this, I made doubly sure that he stayed at home or close beside me when we went out.

In America we must make doubly sure no person is held to account for a crime he or she did not commit.

To make doubly sure, he got Don to do the same, and they split the difference between them.

Ordering the others to wait, he went forward to make doubly sure.

He wanted to make doubly sure about the collar scars.

Behind him his men were making doubly sure that every Brown was quite dead.

"I want you to make doubly sure everything is locked and secure tonight."