21. In the United States during the Second World War, each trade unions and employers avoided federal
A B
limits on wages by offering employees nontaxable medical benefits.
C D
22. Philosophy is the study of the nature of reality, knowledge, existent, and ethics by means of rational
A B C D
inquiry.
23. Poems vary in length from brief lyric poems to narrative or epic poems, which can be as broad in
A B C
scope than a novel.
D
24. The population of California more than doubled during the period 1940-1960, creating problems in
A B
road-building and provide water for its arid southern section.
C D
25. Although based it on feudal models, the colony of Pennsylvania developed a reputation for a
A B C
progressive political and social outlook.
D
26. Hard and resistant to corrosion, bronze is traditionally used in bell casting and is the material used
A B
widely most for metal sculpture.
C D
27. The Appalachian Mountains formation a natural barrier between the eastern seaboard and the vast
A B
lowlands of the continental interior of North America.
C D
28. The United States census for 1970 showed that the French-speaking residents of Louisiana were one
A B C
of the country’s most compact regional linguistic minority.
D
29. When used as food additives, antioxidants prevent fats and oils from become rancid when exposed
A B C
to air, and thus extend their shelf life.
D
31. Copper was the first metallic used by humans and is second only to iron in its utility through
A B C
the ages.
D