What does the author say about energyindependence for America ? _________ A) It sounds very attractive. B) It ensures national security. C) It will bring oil prices down D) It has long been everyone’s dream. 2. What does the author think of biofuels? ________ A) They keep America ’s economy runninghealthily. 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. 3. Why does America rely heavily on oilimports? ________ 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. 4. What does the author say about oiltrade? ________ A) It proves profitable to both sides. B) It improves economic efficiency. C) It makes for economic prosperity. D) It saves the cost of oil exploration. 5. What is the author’s purpose in writingthe passage? _________ A) To justify America ’s dependence on oilimports. B) To arouse Americans’ awareness of the energycrisis. C) To stress the importance of energy conservation. D) To explain the increase of international oil trade.