11.   The prisoner exchange is going slowly.

12.   The unresolved exchange was still going on when our correspondent left.

13.   Their exchange went off as planned, and a pattern was set.

14.   These exchanges still go on, but sometimes the din from crazy areas drowns out other voices.

15.   Usually, the exchanges go after niches, like the new milk futures.

16.   By late morning, though, there was no word from the complex on how the exchange was going.

17.   Floor trading is still done in New York and Frankfurt, Germany but other major exchanges have already gone completely electronic.

18.   The exchange went ahead despite a guerrilla ambush earlier in the day in the south that killed two Israeli soldiers and wounded four others.

19.   The Israeli military said the exchanges of fire went on throughout the day.

20.   The Taliban returned fire and the exchange went on for about two hours before the Afghans withdrew, the sources said.