A board ____ by the side of the well on which these words ____ “Don't forget the digger when you fetch water from the well.” A.set up; wroteB.put up; wroteC.was put up; is writtenD.was set up; were written
网友回答
D解析A，B两项都是主动语态，不符合句子结构的语法要求；C项的第二空与主语的数不一致；所以