—I didn’t tell him the news.
—Oh, you ought .
A. to
B. not to
C. not to have
D. to have
网友回答
A. to
B. not to
C. not to have
(答案→)D. to have
解析：本题考查情态动词的用法。此处表示“过去你应该告诉他这消息，可你没告诉他。” ought not to have done “过去本不该做某事却做了。” ought to have done 意为本来应做但实际没有做。简略答语中have不可省。