Experts are not sure whether this tribe placed bodies in caves as part of burial ceremonies or for other reasons.

VOA: special.2010.11.10

They are also advised not to give anti-reflux medicines for hoarseness unless they are sure patients need them.

VOA: special.2009.09.02

Treasury Secretary Chase was for the plan only if Lincoln was sure it would not mean war.

VOA: special.2009.08.06

For instance,even native speakers are often not sure when to use "lie" and when to use "lay."

VOA: special.2010.02.11

I think it's still possible for us to stamp out al- Qaida, to make sure that extremism is not expanding but rather is contracting.

VOA: special.2009.02.21

But Duncan was not sure that playing Porgy would be right for him.

VOA: special.2010.03.07

For example,experts are still not sure what kind of animals hunt echidnas.

VOA: special.2009.07.07

Experts do not know for sure about his mother,Caterina.

VOA: special.2010.09.15

Mekonnen said he was not sure whether the government would ask for extradition of those convicted in absentia.

VOA: standard.2009.12.23

I'm not sure. And if the whole world is against the good justice for the suspects of the Rwandan genocide, what next?

VOA: standard.2009.04.10

But U.S.Republicans are not so sure about the president's plans for the economy at home.

VOA: standard.2009.04.11

"For sure the military will not only clear and secure the area, but ensure unless and until the area is taken over completely by the civil administration, and the writ of the government is restored and peace and normalcy return to the area, the military will remain in the area,".

VOA: standard.2009.05.07

"Civil Society plays a key role in helping to communicate the need for mothers to bring their children in early for vaccines to complete the vaccination series to make sure that non-governmental organizations deliver and offer vaccines not only one day a week necessarily but on a regular basis,".

VOA: standard.2009.12.28

"If in the future, banks need exceptional assistance in order to get through this, then we will make sure that assistance comes with conditions, not just to protect the taxpayer, but to make sure this is the kind of restructuring necessary for them to emerge stronger.

VOA: standard.2009.04.05