单选题 Dozens of scientific groups all over the world have been ______ the goal of a practical and economic way to use sunlight to split water molecules.
  • A. pursuing
  • B. chasing
  • C. reaching
  • D. winning
【正确答案】 A
【答案解析】[解析] 各项的意思为：pursue追求，寻求，与goal搭配；chase追逐，追赶；reach达到；win赢得。所以，本题选A。