[单项选择]It can be inferred from the passage that which of the following was the prime goal in scientists’ searching for organic means of producing plastic
A. the reduction of energy used in petrochemical plastic manufacture
B. the reduction of the production cost of petrochemical manufacture
C. the development of a biodegradable plastic
D. the creation of plastics with more useful qualities
E. the reduction of fossil fuel emissions in the environment

[单项选择]It can be inferred from the passage that which of the following is true concerning the consumption of fat consumption in Greece versus that of Japan
A. The traditional diet of Japan involves a higher general intake of fat, as a dietary calorie percentage, than does the traditional diet of Crete.
B. The traditional diet of Japan involves a higher intake of saturated fat, measured by calories, than does the traditional diet of Crete.
C. The traditional diet of Japan involves a lesser intake of unsaturated fat, measured by calories, than does the traditional diet of Crete.
D. The traditional diet of Japan includes a higher ratio of monounsaturated fat intake to polyunsaturated fat intake than does the traditional diet of Crete.
E. The traditional diet of Japan involves a lower general intake of fat, as a dietary calorie percentage, than does the traditional diet of Crete.

[单项选择]Passage OneWhat can be inferred from the passage a. The resistance to interracial marriages in the South still stays firm. b. The number of interracial marriages involving Asians, Latinos and Native Americans is greater than that of black-white marriages. c. There were no mixed marriages in Alabama until three years ago. d. The rise of an educated black middle class has increased opportunities for blacks and whites to develop romantic relationships.

[单项选择]It can be inferred from the passage that from a historical perspective, the European conquest of the Americas can be viewed as
A. most similar to earlier successful conquests
B. most different from earlier failed conquests
C. most dissimilar to earlier successful conquests
D. most analogous to earlier failed conquests
E. unlike any earlier conquests in history, successful or not

[单项选择]What can be inferred from the passage
A. The resistance to interracial marriages in the South still stays firm.
B. The number of interracial marriages involving Asians, Latinos and Native Americans is greater than that of black-white marriages.
C. There were no mixed marriages in Alabama until three years ago.
D. The rise of an educated black middle class has increased opportunities for blacks and whites to develop romantic relationships.