单选题 The amount of water used in the manufacturing process is enormous, but the amount wasted is ______.
【正确答案】 D
【答案解析】[解析] 考查语法。the amount of water used(用水量)和the amount wasted(浪费的水量)是比较关系。形容词的比较级可用even，much等词修饰。B中greater已经是比较级，前面不可以再出现more。