It has been about forty years since the United States Food and Drug Administration approved a drug especially for treating lupus.

VOA: special.2010.06.15

It has been more than two years since he has been to a hospital emergency room because of asthma.

VOA: special.2009.07.28

It says salt in the American diet has increased fifty percent since the nineteen seventies, while blood pressures have also risen.

VOA: special.2010.01.27

The prize in economic sciences has gone to sixty-three men since it was first awarded forty years ago.

VOA: special.2009.10.16

Since then it has shipped more than forty thousand bikes to communities in Africa, Latin America and the Caribbean, says director Keith Oberg.

VOA: special.2009.11.16

Since then it has spread to neighboring countries including Kenya,Rwanda,Tanzania and the Democratic Republic of Congo.

VOA: special.2009.09.21

It has collected population records every ten years since the end of the seventeen hundreds.

VOA: special.2010.06.28

Everything is gone." It has been more than a century since a German doctor, Alois Alzheimer,told about a dementia patient whose brain was studied after death.

VOA: special.2009.09.15

Since then,it has received more than one hundred seventy billion dollars in government aid.

VOA: special.2009.03.20

He said,"It has been my decision since becoming a candidate to make no speeches.

VOA: special.2009.07.09

But since nineteen ninety-three it has also paid private lenders to provide them.

VOA: special.2010.04.15

Since then, it has been built and used in many countries.

VOA: special.2009.04.20

It has been a popular entertainment place since the nineteen fifties.

VOA: special.2009.02.16

It has since sold eighty million copies in forty-four languages.

VOA: special.2009.10.09