[单项选择]The habit of economy one of the greatest differences between the savage and civilized men.
A. contains
B. Contributes
C. constitutes
D. continues

[单项选择]The habit of economy one of the greatest differences between the savage and civilized men.
A. contains
B. Contributes
C. constitutes
D. continues

[单项选择]A barter economy is one in which ______.
A. value is decided by weight
B. value is decided by number
C. money is used and goods are not exchanged
D. goods are exchanged and money is not used

[单项选择]One of the serious weaknesses in American economy in the 1920s was（）
A. uncontrolled speculation in the stock market
B. tariff protection
C. huge profits of big businesses
D. too much control over the banking system

[单项选择]Dickens is one of the greatest critical realist writer of ______.
A. the Modern Period.
B. the English Renaissance.
C. the Romantic Period.
D. the Victorian Age.

[单项选择]One of California's greatest problems is providing {{U}}adequate{{/U}} water to meet the needs of its expanding population.
A. sufficient
B. palatable
C. suitable
D. unpolluted

[单项选择]One of California' s greatest problems is providing ______ water to meet the needs of its expanding population.
A. adverse
B. adjacent
C. adequate
D. aesthetic

[单项选择]

Passage 1
One of the greatest mysteries in the study of Cetacea [aquatic mammals] has always been that the creatures found in the stomachs of toothed whales show no teeth marks. Now a University of California at Santa Cruz professor thinks he may have solved the enigma with what he calls the "big bang" theory of cetacean predation.
Ken Norris, natural history professor, believes that rather than use their teeth to attack their victims, toothed whales stun their prey with intense bursts of sound. He points out that all 68 species of odontocetes (a sub-order that includes dolphins) use sound to locate their victims, and suggests this ability may have evolved to the point where it could be used as a weapon.
Millions of years ago, the ancestors of whales had a narrow tapered jaw, streamlined for speed and bristling with long rows of sharp teeth. Today odontocetes are not adapted to surprising their prey or trapping it quickly. Most are
A. Sixty-eight species of odontocetes use sound to locate their victims
B. Toothed whales use sound as weapons
C. Whales and humans have vestigial structures
D. Whale teeth, once sharp, have become somewhat short and uneven

[单项选择]Mark Twain, one of the greatest 19th century American writers, is well known for his
A. international theme.
B. waste-land imagery.
C. local color.
D. symbolism.

[单项选择]To get into the habit of smoking means ______ one's own life short.
A. make
B. making
C. to make
D. made

[单项选择]One of the greatest features of a home （）is the ability to share one Internet connection simultaneously over two or more computers.
A. computer
B. device
C. network
D. work

[单项选择]One of the professor's greatest attributes is ______. ( )
A. when he gives lectures
B. how in the manner that he lectures
C. the way to give lectures
D. his ability to lecture

[单项选择]One of Shelley's greatest political lyrics is ______, which later became a rallying song of the British Communist Party.
A. Ode to the West Wind
B. Prometheus Unbound
C. Men of England
D. Ode on Melancholy