单选题
One way to understand thousands of new words in gain ______ good knowledge of basic word formation．
A．/
B．the
C．a
D．one
A
B
C
D
【正确答案】
C
【答案解析】
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．
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