Energy will be one of the defining issues of this century. One thing is clear: the era of (1)_____ oil is over. What we all do next will determine how well we meet the energy needs of the entire world in this century and (2)_____. Demand is soaring like (3)_____ before. As populations grow and economies (4)_____, millions in the developing world are enjoying the benefits of a lifestyle that (5)_____ increasing amounts of energy. In fact, some say that in 20 years the world will (6)_____ 40% more oil than it does today. At the same time, many of the world"s oil and gas fields are (7)_____ And new energy discoveries are mainly occurring in places where resources are difficult to (8)_____, physically, economically and even politically. When growing demand meets (9)_____ supplies, the result is more (10)_____ for the same resources. We can wait until a crisis forces us to do something. (11)_____ we can (12)_____ to working together, and start by asking the (13)_____ questions: How do we meet the energy needs of the developing world and those of industrialized nations? What role will renewables and (14)_____ energies play？What is the best way to protect our environment? How do we accelerate our conservation efforts? (15)_____ actions we take, we must look not just to next year, (16)_____ to the next 50 years. At Chevron, we believe that innovation, collaboration and conservation are the (17)_____ on which to build this new world. We cannot do this alone. Corporations, governments and every citizen of this planet must be part of the solution as (18)_____ as they are part of the problem. We (19)_____ scientists and educators, politicians and policy-makers, environmentalists, leaders of industry and each one of you to be part of (20)_____ the next era of energy.

【正确答案】 A

【答案解析】解析：commit使承担义务，使做出保证，使表态；strive努力，奋斗，力求；conduct实施，处理，进行；simulate冒充，模仿，模拟。本题考查动词的前后搭配和正确理解、使用。"我们可以承担义务一起行动"英文为"we can commit to working together"。本句中的"to"为介词，故不能用"strive"。

【正确答案】 C

【答案解析】解析：alternate交替的，轮流的，间隔的；subterranean地下的，隐蔽的；alternative两者(或两者以上)择一的，供选择的；abundant大量的，丰富的。本题考查"and"一词前后的并列平行关系以及形容词修饰名词。"可再生性和可替换性能源"英文应为"renewable and alternative energies"。

【正确答案】 D

【答案解析】解析：Once一旦；However无论如何，不管怎么样；Although虽然，尽管；Whatever无论什么，不管什么。本题考查正确使用让步状语从句的连接代词。由于本题空白处后是名词 (actions)，故应选用"whatever"一词。"无论我们采取什么行动"英文应为"whatever actions we take"。

【正确答案】 B

【答案解析】解析：but then然而，但另一方面；but而(是)；but yet然而，但另一方面；but for倘没有，要不是。本题考查英文中常用的"not…but"(不是…而是)结构。"我们不只是关注明年，而是关注未来的50年"英文应为"we must look not just to next year，but to the next 50 years"。

【正确答案】 D

【答案解析】解析：symbolically象征(性)地；synchronously同时发生(或存在、出现)地；swiftly迅速地；surely确实，无疑，一定，必定。本题考查比较级结构的正确理解和副词的使用。"这个星球的每一位公民如同他们是问题的一部分也必定是解决方法的一部分"英文应为"every citizen of this planet must be part of the solution as surely as they are part of the problem"。