(A) genuine diamonds from imitation diamonds
(B) genuine diamonds apart from imitations
(C) between genuine diamonds and imitation diamonds
(D) among genuine diamonds and imitation diamonds
(E) whether diamonds are imitation or genuine
2. Convinced at last of the soundness of her advice, the villagers tried crop rotation, built crude sanitary facilities, and even the use of goat's milk for the making of cheese.
(A) the use of goat's milk for the making of cheese
(B) used goat's milk to make cheese
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15. Astronomers studying the newly discovered star say that it provides clues about our galaxy's origin, that it may supply data about how fast our galaxy is expanding, and moreover it is perhaps the most distant star in the entire Milky Way.
(A) about how fast our galaxy is expanding, and moreover it is perhaps
(B) regarding the speed our galaxy expands at; moreover, they think it may be
(C) about how fast our galaxy expands and perhaps be
(D) on the galaxy's expansion rate and perhaps
(E) about how fast our galaxy is expanding, and that it is perhaps
16. The decisions of John Marshall, the fourth chief justice, have had a greater influence than any chief justice in history.
(A) than any chief justice in history
(B) historically than any other chief justice
(C) than have those of any chief justice in history
(D) in history as any other chief justice has had
(E) than those of any other chief justice in history
17. Most North Carolina ski resorts broadcast music onto the slopes; skiers can choose among hard rock, soft pop, and "beautiful music" slopes, there are no slopes without music.
(A) skiers can choose among hard rock, soft pop, and "beautiful music" slopes, there are
(B) because skiers can choose hard rock, soft pop, or "beautiful music," there are
(C) however, skiers can choose among hard rock, soft pop, "beautiful music," and
(D) although skiers can choose among hard rock, soft pop, and "beautiful music" slopes, there are
(E) skiers can choose among hard rock, soft pop, "beautiful music" slopes, but
18. The owner of Steele's Grocery in Osage, Ohio, saved $600 monthly on heat during the winter by putting all his refrigerator air compressors together in an insulated compartment, then installing two fans and a duct that carried waste heat from the compressors into the main part of
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