1. With the passing of time and the encroachment of people, the habitat of gorillas ____ to decrease.
    • A. continuing
    • B. continues
    • C. which continue
    • D. that it has continued
  2. Sugar intake, particularly that of refined sugar, ____ curtailed by most overweight people wishing to lessen their corpulence.
    • A. must being
    • B. must
    • C. which must
    • D. must be
  3. In recent months, the final mapping of the human genome ____ the range of medical treatments and cures available to those suffering from various diseases.
    • A. has extended
    • B. will extend
    • C. extends
    • D. will have extended
  4. Intelligent life on other planets, while remaining an intriguing possibility, ____ yet to be discovered.
    • A. has
    • B. has been
    • C. has not
    • D. have
  5. Despite being basically arboreal in nature, koalas __ to inhabit a specific territory and range of some 30 square miles.
    • A. knowing
    • B. which know
    • C. are knowing
    • D. are known
  6. Initially elected as a labor leader, Jimmy Hoffa _____ mysteriously.
    • A. vanishing
    • B. vanished
    • C. who vanished
    • D. vanishes
  7. Broccoli _____ best in gardens having loose, well-composted soil, and full sunlight.
    • A. had grown
    • B. which grows
    • C. grows
    • D. growing
  8. Many of the novels of Kurt Vonnegut ____ a remarkable skepticism about the ultimate value of technological advances.
    • A. display
    • B. had displayed
    • C. will have displayed
    • D. they display
  9. Because copper is nonconductive, it ____ for housing electrical cords and circuitry.
    • A. values
    • B. has valued
    • C. is valued
    • D. is being valuable
  10. Numerous performances of Mozart’s operas ___ in Austria long before the beginning of the 19th century.
    • A. perform
    • B. had performed
    • C. had been performed
    • D. were performing

<!– ANSWER KEY 1. B 2. D 3. A. 4. A. 5. D. 6. B. 7. C 8. A 9. C 10. C