Passengers delayed on European airlines may be able to get back at least some of the money they had to spend.

VOA: special.2010.04.23

But first,Mister Venter said, they had to de-activate a gene in the receiving cell that would have killed the synthetic genome.

VOA: special.2010.07.20

They had to work. By the time Sarah was five years old, she was picking cotton in the fields with her family.

VOA: special.2010.03.28

They had to keep the herd together day and night and protect it from bad men and Indians.

VOA: special.2010.03.18

And they had to make this move without the equipment in the command module that kept the spacecraft on its flight path.

VOA: special.2009.07.22

And they had to defend a line almost sixty kilometers long, from Richmond to the city of Petersburg.

VOA: special.2009.12.17

They had to keep their discovery a secret until they had a legal claim to the land where they had found the gold.

VOA: special.2009.02.04

A British lawmaker told parliament in eighteen seventy that Englishmen were leaving their country, not because they wanted to, but because they had to.

VOA: special.2010.05.13

They had to give her more space. She then had six hundred students in the school.

VOA: special.2009.07.26

They had to cancel the moon landing and use the moon lander as a lifeboat.

VOA: special.2009.07.29

They opposed the import taxes -- tariffs -- they had to pay on foreign products.

VOA: special.2010.04.15

When bad weather prevented navigators from seeing the sun,moon or stars, they had to use a method called "dead reckoning" to find the ship's position.

VOA: special.2009.12.23

Yet,they had to fight the criticism of those opposed to any new development in jazz.

VOA: special.2009.05.03

Government leaders knew they had to do something to prevent such floods in the future.

VOA: special.2009.08.12