It was ________ he had done to the villagers ________ saddened his parents．
A.that…thatB.what…thatC.what…whatD.that…what在线课程B
解析：
What he had done to the villagers saddened his parents．是这句强调句的句子原句，what引导的是一句主语从句。这句句子的意思是“他对村民所做的使他的父母很伤心。”主语从句中what是指do的宾语，所以要用what，而后面的that是强调句结构。