题目内容：

Lucy said she hadn't heard ___music before.A:such a beautiful piece of B:such a wonderful
choose A or
WHY?

优质解答

A
music 是不可名词,前面不能直接加a,必须加上piece（块；张；首；条）短语,才能表达数量的概念.
a piece of music 一首乐曲
a wonderful piece of music 一首优美的乐曲