问题描述：
不定冠词'a'的提问
One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.
A./ B.the C.a D.one
knowledge是不可数名词 那请为什么答案是C 而不是A
One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.
A./ B.the C.a D.one
knowledge是不可数名词 那请为什么答案是C 而不是A
问题解答：
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