In 1999, the price of oil hovered around $16 a barrel. By 2008, it had (21) ______ the $100 a barrel mark. The reasons for the

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问题      In 1999, the price of oil hovered around $16 a barrel. By 2008, it had  (21) ______  the $100 a barrel mark. The reasons for the surge  (22) ______  from the dramatic growth of the economies of China and India to widespread  (23) ______  in oil-producing regions, including Iraq and Nigeria’s delta region. Triple-digit oil prices have  (24) ______  the economic and political map of the world,  (25) ______  some old notions of power. Oil-rich nations are enjoying historic gains and opportunities,  (26) ______  major importers—including China and India, home to a third of the world’s population—  (27) ______  rising economic and social costs.
     Managing this new order is fast becoming a central  (28) ______   of global politics. Countries that need oil are clawing at each other to  (29) ______   scarce supplies, and are willing to deal with any government,  (30) ______   how unpleasant, to do it.
     In many poor nations with oil, the profits are being lost to corruption,  (31) ______  these countries of their best hope for development. And oil is fueling enormous investment funds run by foreign governments,  (32) ______  some in the West see as a new threat.
     Countries like Russia, Venezuela and Iran are well supplied with rising oil  (33) ______  , a change reflected in newly aggressive foreign policies. But some unexpected countries are reaping benefits,  (34) ______  costs, from higher prices. Consider Germany.  (35) ______  it imports virtually all its oil, it has prospered from extensive trade with a booming Russia and the Middle East. German exports to Russia  (36) ______  128 percent from 2001 to 2006.
     In the United States, as already high gas prices rose  (37) ______  higher in the spring of 2008, the issue cropped up in the presidential campaign, with Senators McCain and Obama  (38) ______   for a federal gas tax holiday during the peak summer driving months. And driving habits began to  (39) ______  , as sales of small cars jumped and mass transport systems  (40) ______   the country reported a sharp increase in riders.  

选项 A、look for
B、lock up
C、send out
D、keep off

答案B

解析 此句的意思是:妥藏稀缺供应物品,lock up把……锁起妥藏:如:You should lock the jewels up in the safety.你应当把珠宝首饰锁起妥藏在保险箱里。其他选项,A.look for寻找,C.send out发送,D.keep off让开,都不符合上下文意思。根据题意,正确B。
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