题目内容
Read the following text. Choose the best word or phrase marked A, B, C or D for each numbered blank. The use of nuclear power has already spread all over the world. 1 , scientists still have not agreed 2 what should be done with the large amounts of waste materials that 3 to increase every year. Most waste materials are 4 of simply by placing them somewhere. But nuclear waste must be 5 with great care. It 6 dangerous radiation and it will continue to be 7 for hundreds of, thousands, even millions of years. How should we get 8 of such waste material in such a way 9 it will not harm the 10 Where can we 11 distribute it One idea is to put this radioactive waste inside a thick container, which is 12 dropped to the deep bottom of the ocean. 13 some scientists believe that this way of 14 nuclear waste could kill fish and other living things in the oceans or interfere 15 their growth. Another way to 16 nuclear waste is to send it into space, to the sun, 17 it would be burned. Other scientists suggest that this polluting material be 18 thousands of meters under the earth’s surface. Such underground areas must be free 19 possible earthquake. Advances are being made. But it may still be many years 20 this problem could be finally settled.
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