(2009湖北27)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
答案:B
解析:考查形容词辨析。primary:首要的,主要的,原始的,初级的;alternative:可选择的,可替代的;instant:立即的,即刻的,紧迫的,速溶的;unique:独一无二的,独特的。根据句意选B。
句意:因为煤和石油越来越少,科学家们正在探索利用替代能源的新方法,比如用太阳能、风能和水能作为动力和燃料。
