改反意疑问句I told yoou he would be able to achieve success in his

改反意疑问句I told yoou he would be able to achieve success in his field,____?A.would he B.wouldn't he C.did I D.didn't 我觉得应该选B,但答案给的是D.
另外一道题Tom told me that you were going to take a trip to America,weren't you?我还看过一道全国高考题 I was told that he would come back,wouldn't he