单选题One way to understand&nbs

问题补充：

单选题Onewaytounderstandthousandsofnewwordsingain_____goodknowledgeofbasicwordformation.A./B.theC.aD.one

答案：

C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 betty understanding of the passage , a good knowledge of English