21.   Awkwardly, the government has chosen this moment to order firms to start selling cleaner types of gasoline in a number of cities.

22.   Branson said he expected the British government to chose Virgin to fly to Shanghai instead of its rival British Airways Plc. because British Airways already flies to Beijing.

23.   A spokesman for the U.S. attorney would not comment on why the government chose to prosecute Lauersen.

24.   But Aberkane, the protest organizer, said the leaders the government chose were not real leaders, but puppets.

25.   But in Canada, the government chose another path.

26.   But in China, more important is what regulations the government chooses to enforce.

27.   But the government chose not to run the risk of social turmoil from devaluing the peso, which would have made popular foreign goods more expensive at home.

28.   But the government instead chose to use a budget surplus from a booming economy in other ways.

29.   But the government chose its defendants carefully, he said, charging only those it felt confident it could convict.

30.   But when a crisis erupts, there is nothing automatic about the commitment, since governments can choose to reject participation, as dozens did in Rwanda.