单选题 We must ______ on water during the dry season.
  • A. economical
  • B. economize
  • C. economy
  • D. economically


【正确答案】 B
【答案解析】economize 是动词，economical 是形容词，economically 是副词，economy 是名词，而此题缺少谓语动词，所以选B. economize on (节约，节省)。