Experts say the situation is likely to continue until investors feel more sure about signs of economic recovery.

VOA: special.2009.08.21

But Professor Bedau says that nobody can be sure about the results of making new forms of life.

VOA: special.2010.07.20

They said they were not sure about his decision to withdraw from university studies to play poker.

VOA: special.2010.07.26

When people examine this document, they will say, 'He was not sure about that.'

VOA: special.2009.10.08

But some people are still not sure about these programs.

VOA: special.2010.06.17

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

VOA: special.2010.09.15

And doctors still are not sure about the cause.

VOA: special.2009.04.07

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

VOA: standard.2009.04.11

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

When Mister Wesley was sure he had found something new, he quickly contacted professional astronomers about his find.

VOA: special.2009.08.25

Some members of the local community had strong feelings about the death and worked to make sure the skeleton stayed on the island.

VOA: special.2011.06.29

The Hepburns made sure to educate their children about important political and social subjects.

VOA: special.2009.09.20

But I was sure of two things about the clergyman.

VOA: special.2010.03.27

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