1. The United States has long prided itself on being a melting pot of culturally ---- peoples.
2. The contemporary world economy differs ---- from what the traditional economic theorists of the 1930s envisaged.
3. In recent years ---- complex and persistent problems in economic and social fields have led people to wonder why once comfortable answers no longer seem adequate to todays questions.
4. Since the 1950s, modern dance in Europe and America has ---- a vigorous process of creativity.
5. The assassination by terrorists of Signor Aldo Moro, five times Prime Minister of Italy, in May 1978 was ---- by everyone as an act of barbarism.