Then two laboratories in the United States and Britain did radiocarbon tests.

VOA: special.2010.08.03

Nothing happened. Then two more let the mosquitoes bite them.

VOA: special.2010.05.18

Then two natural resources coal and trees became important.

VOA: special.2009.07.20

He was honored first as a member of the Yardbirds, then with Cream, then as a solo performer in two thousand.

VOA: special.2009.10.19

The meat then was grilled for five minutes on each side at a temperature of more than two hundred degrees Celsius.

VOA: special.2010.06.01

If vaccine supplies are limited, then the committee says two groups of children should be vaccinated before other children.

VOA: special.2009.08.05

The legislation was first proposed in two thousand seven by Joe Biden, then a senator, now the vice president.

VOA: special.2009.10.24

But he missed from about two and a half meters, and then lost in a playoff to American Stewart Cink.

VOA: special.2009.08.01

Then, almost two years since announcing his candidacy for America's highest office, Mr. Obama began the work of president.

VOA: special.2009.01.24

Then he sent out two more of his men with a prisoner to try to negotiate a ceasefire.

VOA: special.2009.06.25

He was honored as part of Simon and Garfunkel, then as a solo artist in two thousand one.

VOA: special.2009.10.19

Once the money is printed, guillotine cutters separate the sheets into two notes, then into individual notes.

VOA: special.2010.11.15

In two thousand, then-President Bill Clinton told the world that international and private groups had identified the genetic structure of a human being.

VOA: special.2010.07.20

Then on April thirtieth, two thousand seven,a huge fire of unknown cause almost completely destroyed South Hall.

VOA: special.2009.08.21