21.   A senior Western official said Friday night that Chinese security agents violated an agreement with the United Nations by seeking to control access to the conference site in Beijing.

22.   A stylus-like pointing device controls access to the multimedia content.

23.   Access is strictly controlled and there is no entry into Cuba, except for a handful of Cuban nationals employed on the base.

24.   All of the programs reviewed here allow you to set up a user name and password to control access to your machine.

25.   But Amtrak cannot control access to its stations and trains the way airlines can control access to their aircraft.

26.   Canadian officials also acknowledged that the growing black market made it more difficult to control access to cigarettes by teen-agers.

27.   City officials have argued that the law allows nudity in theater plays and other events indoors, where access can be controlled, but not outdoors.

28.   Consolidating that empire means subjugating the Eritreans, who control access to the Red Sea, without which Ethiopia is a land-locked state.

29.   Critics, though, say it will let large media companies control access to the public, particularly in smaller regions where there is little competition.