11.   A fair number of influential Cuban officials appear to believe that deep changes will have to be made simply to keep the economy from collapse.

12.   Administration officials said Saturday that Joseph Sullivan, head of the American liaison office in Havana, is not scheduled to meet with Cuban officials until next week.

13.   All along, officials in Washington speculated that Cuba would never turn over someone reputed to have information linking Cuban officials to criminal activities, like drug smuggling.

14.   But Cuban officials in Washington said they need to check their identities.

15.   But Cuban officials refuse to divulge details.

16.   But after making small political moves that encouraged American officials, Cuban officials have increasingly dismissed the idea of gradual progress toward closer ties with the United States.

17.   But Cuban officials and diplomats here worry that Clinton could end up agreeing to a diluted version of it.

18.   But that was under the watchful eye of Cuban officials.

19.   But the overture by Cuban officials seems intended to bolster U.S. business support for better ties between the nations.

20.   But six years ago, when Cuban officials invited him to attend a cultural conference, he said no.