31.Turquoise,which found in microscopic crystals,is opaque with a waxy luster,

A B

varying in color from greenish gray to sky blue.

C D

32.Homo erectus is the name commonly given into the primate species from which

A B C

humans are believed to have evolved.

D

33.Today,modern textile mills can manufacture as much fabrics in a few seconds as

A B

it once took workers weeks to produce by hand.

C D

34.The Hopi,the westernmost tribe of Pueblo Indians,have traditionally live large.

A B C

multilevel structures clustered in towns.

D

35.Exploration of the Solar System is continuing and at the present rate of progress

A B

all the planets will have been contacted within the near 50years.

C D

36.Since their appearance on farms in the United States between 1913and 1920,

A B

trucks have changed patterns of production and market of farm products.

C D

37.Antique collection became a significant pastime in the 1800's when old object

A B C

began to be appreciated for their beauty as well as for their historical importance.

D

38.American painter Georgia O'Keeffe is well known as her large paintings of

A

flowers in which single blossoms are presented as if in close-up.

B C D

39.Despite television is the dominant entertainment medium for United States

A

households,Garrison Keillor's Saturday night radio show of folk songs and stories is

B C

heard by millions of people.

D

40.The work which the poet Emma Lazarus is best known is "The New Colossus",

A B

which is inscribed on the pedestal of the Statue of Liberty.

C D