2014年5月托福考试模拟试题及答案(第一套)_第9页

　31.The mountains, especially the Rocky Mountains, formerly constituted a seriously

　　A B

　　barrier to east-west trade in British Columbia.

　　C D

　　32.Telescope are frequently used in astronomy to collect light from a celestial object,

　　A B

　　bring the light into focus, and producing a magnified image.

　　C D

　　33.Diamond is the hardest known substance, so diamond can be cut only by another

　　A B C D

　　diamonds.

　　34.There are about 350 species and subspecies of birds in danger of become extinct,

　　A B

　　with a large number of them, 117 in all, found on oceanic islands.

　　C D

　　35.The nineteenth-century romantic movement in art was partially a reaction to what

　　A B C

　　was perceived as overemphasis on reasonable and order in neoclassicism.

　　D

　　36.Like triglycerides, cholesterol is a type of fat that is both consumed in the diet but

　　A B C D

　　manufactured by the body.

　　37.Both the United States silver dollar and half-dollar, first minted in 1794, had a figure

　　A B C

　　of Liberty on one side and a eagle on the reverse side.

　　D

　　38.For an advertisement to be effective, its production and placement must to be based

　　A B C

　　on a knowledge of human nature and a skilled use of the media.

　　D

　　39.While photosynthesis in green plants, light energy is captured and used to convert

　　A B C

　　water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

　　D

　　40.The Democratic Party, the most oldest existing political party in the United States,

　　A B

　　has played a vital role in the nation’s history.

　　C D