the 一类事物___umbrella is ___useful tool in rainy weatherA an ,
the 一类事物 ___umbrella is ___useful tool in rainy weather A an ,a B an,an C the ,an D an,the 选A 不是是the 与单数名词连用,表示一类事物 the umbrella 阳伞这类的呀 不对吗如The horse is a kind of animal 有in rainy weather 做定语 应该useful tool 加 the 特指呀 是下雨天的有用工具 如 the wood of some tree 特指这些树的木头