Some of the guests were not sure what to think of Ellen and Doug's celebration -- or even how to describe it.

VOA: special.2011.05.23

And they should make sure they know what is in the medicines they take and how much of each drug is safe to take.

VOA: special.2009.07.08

And they should make sure they know what is in the medicines they take and how much of each one is safe to take.

VOA: special.2009.07.21

Scientists are not sure how Buruli ulcer disease spreads or even how it develops in nature.

VOA: special.2009.04.06

They should make sure they understand how and when to take their medicines.

VOA: special.2009.07.28

No one was sure how he would be received.

VOA: special.2010.03.07

Nobody is sure how the word got started.

VOA: special.2010.05.16

There was something else that was worrying Oive, and she did not know just how to begin to talk about it At last,she spoke out, not sure what Nate's answer would be.

VOA: special.2010.01.09

No one is sure how they developed.

VOA: special.2010.01.17

No one is sure how it happened.

VOA: special.2009.01.27

"How do you make sure you are designing a system where you are going to constrain risk taking, you can prevent crises from spreading,and -- if a major institution managed itself to the edge of the abyss -- that we are able to put them out of their misery."

VOA: special.2010.04.16

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

VOA: standard.2010.05.06

The government also is giving its all to make sure people know how to protect themselves from getting HIV/AIDS.

VOA: standard.2010.05.29

So,basically,that's how I started. Sometimes I'm not sure if I've done the right thing or not."

VOA: standard.2010.07.20