选B
help 既可用于单数也可用于复数,但要视语境而定.help除了有“帮助”之意外还有“人,仆人,帮手,帮忙的人,方法”等等意思.表“帮助”的意思时为抽象名词常用单数,其余意思都是指具体事物应根据句意确定用单数还是复数.例：you gave me a great help.你帮了我一个大忙.You are a great help!你净帮倒忙!
What___ great help your advice is?A./ B.a C.an D.the 选哪一个呢?h
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