填空题.In a sign that oil prices and an extremely cold winter have affected gasoline prices, those prices are now more than $3 per gallon for regular in all 50 states. Even states in which the prices tend to be pushed down by proximity to supply and refineries, prices have not remained below the 21 . According to GasBuddy, only a few states have prices below $3.15. These include Montana, South Carolina, Utah, New Mexico, Louisiana, Mississippi, Wyoming, Missouri and Arkansas. Even oil-producing states Texas and Oklahoma have prices that have inched up toward $3.20. The 22 price of a gallon of regular nationwide is $3.34. At the far end of the spectrum of high gas prices are several states that among them have well over a quarter of the nation's 23 . The average price of a gallon of regular is above $3.60 in California and New York, and above $3.50 in Michigan, Illinois and Pennsylvania. In most cities along the coast between San Francisco and San Diego, the price has 24 to more than $3.70. Oil prices continue to sit above $100 a 25 . That is 26 to change in the near term. Crude prices have risen recently for several reasons, most of which will not be short-lived. Economic 27 in China has picked up by most measures. China is the largest importer of 28 in the world, based on most research about energy use and trade. Home heating oil demand has spiked (剧增) because of an 29 cold winter in the Northern Hemisphere. The freeze, particularly in the United States, has not shown any 30 toward easing. A. unusually E. threshold I. beverage M. population B. unlikely F. barrel J. alike N. popularity C. recently G. crude K. risen O. growth D. average H. trend L. dropped