Misc: What is the name given to the fortified gateway of a castle?

Questions

On This Day In January 1986 - Spain and ______ joined the European Community (EC.?

On This Day In January 1987 - A pro-democracy rally took place in Beijing's ______ Square (China.?

On This Day In January 1990 - David ______ was sworn in as New York City's first black mayor.?

On This Day In January 1992 - The ESPN Radio Network was officially______ .?

On This Day In January 1993 - ______ split into two separate states, the Czech Republic and Slovakia. The peaceful division had been engineered in 1992.?