题目内容
As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.
A. primary B. alternative C. instant D. unique
B
句意: 由于石油和煤炭越来越少, 所以科学家们正在探索新的方法来利用诸如太阳能, 风能和水能等可替代性能源作动力和燃料。primary主要的, 初期的, 根本的; alternative可替代的, 两者择一的; instant立即的, 立刻的; unique独特的, 唯一的。又如: Do you have an alternative solution to the problem?你有没有别的办法来解决该问题呢?Could you save her life if there is an alternative medicine?假如有一种替代疗法你可以挽救她的生命吗?
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