2009高考英语模拟试题（三）下

 (e)

the increase in the price of oil has brought the world to its senses. scientists are searching for a suitable alternative (替换) but so far in vain. they are considering how they can make better use of the two other major fuels, coal and natural gas, but they have found that neither can take the place of oil in their economics. in recent years there has been a growing concern for the environment and coal is not a popular fuel with environmentalists. natural gas, the purest of the three fuels, is also the most limited in supply.

     the answer would seem to lie in nuclear power stations. they need very little fuel to produce enormous amounts of power and they do not pollute the atmosphere. their dangers, however, are so great and the cost of building them are also high. not o