The dictionary my father bought me is( )to me in my English study
A of a great help Ba great help Cgreat help Dgreat helpful
为什么不选A和D
參考答案:be of+noun=be +adj.
great是形容词,形容词(great)不可以直接修饰形容词(helpful)
所以D不对
of a great help没有用a great help的用法
如果修饰可数名词的话用 great many+noun(复数)
如果修饰不可数名词的话用a great deal of+noun