单选题 One way to understand thousands of new words is to gain ______ good knowledge of basic word formation.
  • A. /
  • B. the
  • C. a
  • D. one
【正确答案】 C
【答案解析】[解析] 当某些不可数抽象名词含义具体化，而被某些修饰词修饰时，前面要加不定冠词。如a better understanding of the passage，a good knowledge of English等。