it's a good thing that i_ a raincoat,otherwise i'd have been wet all over

brought是一般过去时,had brought是过去完成时,表达的是一个在“过去的过去”发生的动作.用过去完成时的时候必须有一个过去的时间或动作作参照.如：I had learned 2000 English words by the end of last month. by ...