問題詳情
Passage 2 When oil was inexpensive and 30. , people learned to depend on it for heat and fuel. Morerecently, oil has been more difficult to find, as it is hidden deep beneath the earth under many layersof solid rock. There has even been oil 31. , and we have had to wait in long lines and pay highprices for gasoline. A serious 32. of oil, coal, and similar fuels is the pollution they createaround our cities. Today, researchers are focusing on energy sources beyond oil. Countries andcompanies are pursuing 33. energy. They are looking for energy sources that are 34. and cannever be used up. These energies follow the principle that energy production should be sustainable,not temporary. Government 35 . in the form of money or tax breaks have helped convince somecompanies to develop these innovative energy technologies. Experts think that in the future theworld will utilize this kind of energy for a larger percentage of its total energy needs.
【題組】30.
(A) shortage
(B) abundant
(C) scarce
(D) valuable
參考答案
答案：B
難度：非常簡單0.9
書單：沒有書單，新增