IV . Cloze (20 points)
Directions:
For each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on AN-SWER SHEET I.
In the course of the first half of the twentieth century, the United States made the shift from coal to oil. In 1900 the energy 61 from burning petroleum in the United States was only 4 percent of 62 obtained from burning coal. By the time World War Ⅱ was 63 , we Americans were getting more of our 64 from oil and natural gas than from coal, 65 the balance shifting farther in 66 of oil and gas each year. Oil, 67 liquid, is much more convenient to mine, transport, and use, than coal is : 68 more. The switch to oil in the United States meant that energy was much more easily 69 . Electricity poured out of the nation’s generators in an endlessly increasing stream 70 we began to live in a world 71 which all the controls were at our fingertips, 72 to speak. And why not? The real 73 of the pools of oil 74 under the Middle East only became known after World War Ⅱand we all received the impression of a hitherto-unknown ocean of oil 75 for the taking. 76 a few heady years we used all we 77 ,more and more and more, and it seemed to us that the supply was so great that we could 78 thoughts of a possible end 79 some indefinite future. Let our grandchildren 80 and suffer.
