61. What does the author say about energy independence for America?
A) It sounds very attractive. C) It will bring oil prices down.
B) It ensures national security. D) It has long been everyone s dream.
ANSWER 答案
62. What does the author think of biofuels?
A) They keep America s economy running healthily.
B) They prove to be a good alternative to petroleum.
C) They do not provide a sustainable energy supply.
D) They cause serious damage to the environment.
ANSWER 答案
63. Why does America rely heavily on oil imports?
A) It wants to expand its storage of crude oil.
B) Its own oil reserves are quickly running out.
C) It wants to keep its own environment intact.
D) Its own oil production falls short of demand.
ANSWER 答案
64. What does the author say about oil trade?
A) It proves profitable to both sides. C) It makes for economic prosperity.
B) It improves economic efficiency. D) It saves the cost of oil exploration.
ANSWER 答案
65. What is the author s purpose in writing the passage?
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