Last week I went home and saw my grandfather．He became so old and upset and I asked him what _______?
A.was the matterB.the matter wasC.wrong wasD.had been the matter在线课程A
在What is the matter?这个句型结构中, what是主语, 所以在变为间接引语时不能改变语序；另外, 问“有什么麻烦”, 是对过去状态的询问, 这种状态与“他表现出不安”是同时发生的, 所以用一般过去时, 而不是过去完成时态。正确答案为A项。