66. Mars’s tiny moon Phobos is a small mountain of rock that________ from the asteroid belt by Mars’s gravitational pull.
A. was probably captured
B. it probably
C. the probable capture
D. probably the capture
67. ________ is famous as the home of the United States Naval Academy.
A. Annapolis
B. Because of Annapolis
C. Why Annapolis
D. Because Annapolis
68. Some scientists think________ be a planet but a moon of Neptune.
A. that Pluto does not seem
B. not Pluto
C. Pluto that might not
D. that Pluto might not
69. With________ of sophisticated oil lamps elaborate tools were made to cut the wicks.
A. appeared
B. the appearance
C. the appearance was
D. it appeared
70. Fort Union was the site of what ________ principal fur-trading post on the upper Missouri River.
A. the
B. being the
C. was the
D. it was the
71. Since________ commercial risk, it has to appeal to a large audience to justify its cost.
A. the face of the movie
B. moving faces
C. a movie faces
D. to face a movie
72. A current of water known as the Gulf Stream comes up from the Gulf of Mexico, and then________ the North Atlantic toward Europe.
A. it crosses
B. crossing
C. with its crosses
D. crosses it
73. Systems________ the two symbols 0 and 1 are called binary number systems.
A. use
B. they use
C. uses
D. using
74. Genes, ________ the blueprints for cell construction, exist in tightly organized packages called chromosomes.
A. are
B. they are
C. which
D. which are
75. The Earth’s atmosphere consists of gases________ in place around the Earth by the gravitational pull of the planet.
A. held
B. hold
C. it holds
D. the hold
76. Oscar Hammerstein II collaborated with a number of composers including Jerome Kern, whom ________ in writing the musical Show Boat.
A. joined
B. was joined
C. he joined
D. joining
