He could not be sure of their support if he declared that the purpose of the war was to free the slaves.

VOA: special.2009.10.08

Testosterone is known to make people more sure of themselves and more willing to take risks.

VOA: special.2009.02.25

Nobody is sure of the exact beginning of the word.

VOA: special.2010.03.07

But I was sure of two things about the clergyman.

VOA: special.2010.03.27

But these men were sure of one thing.

VOA: special.2009.05.21

Robert E.Lee was sure of that.

VOA: special.2009.10.15

He says no one seems sure of how bad the situation is, or what will happen down the road.

VOA: standard.2010.05.06

"According to my research, people actually are not sure of the difference between South and North Korea.

VOA: standard.2009.11.05

Jurors must find a defendant not guilty even if they are not completely sure the person is innocent of any crime.

VOA: special.2009.08.31

We need to do a much better job of making sure that what's in those vending machines is very consistent.

VOA: special.2010.03.17

She says their latest findings should settle any question about the value of making sure every pregnant woman receives iron supplements.

VOA: special.2011.01.05

The NASA team still is not sure how much of what they have found is water and how much is hydroxyl.

VOA: special.2009.09.30

She made sure there were a large number of workers to give the necessary attention to all the kids.

VOA: special.2009.08.23

He had to make sure the great light on the top of light house would shine during the black storm.

VOA: special.2010.05.08