Rudolf found it hard to believe that there was someone in the world who did not know what violin was.

VOA: special.2010.05.08

When you're teenagers, you don't quite know what to write on there. Little Os and Xs for kisses and things like that.

VOA: special.2010.02.08

Another is that we do not necessarily know what drives us to do the things we do.

VOA: special.2010.04.13

"What we know from research on teen brain development, is that teens don't really have fully developed brains until they're twenty-five years old.

VOA: special.2010.07.01

Young Paul grew so big that his parents did not know what to do with him.

VOA: special.2009.01.24

What many people do not know is that it was meant sarcastically, as just the opposite.

VOA: special.2011.06.27

"They're being told that, 'Hey you know what, I can send you a few dollars.

VOA: special.2010.04.12

Know what your traditional reactions are. A person that knows their drugs and the effects of their drugs are in fact the best security against fakes."

VOA: special.2010.03.01

The attack was so quick that the audience did not know what had happened.

VOA: special.2009.12.31

In the death camps,she said, the cloth was so thick that she did not really know what she was photographing until she saw the finished pictures.

VOA: special.2009.05.17

"I can't think of a person that I know of in the world that used their celebrity status for a greater good than what Manute Bol did.

VOA: special.2010.07.05

"Don't pretend that you don't know what you have done to me."

VOA: special.2009.05.30

Jeffrey Olson says experts do not know what will take the place of the plants and animals that are lost, or how wildlife will survive in a changed environment.

VOA: special.2009.09.28

But I also know that we've got a long way to go to fully restore our economy and recover from what's been the longest and deepest downturn since the Great Depression."

VOA: special.2009.10.30