—Lucy，I told Denny about your success.
—Oh，you ________ him；I had told him already.
A. shouldn’t have told B. needn’t have told
C. couldn’t have told D. mustn’t have told
—Lucy，I told Denny about your success.
—Oh，you ________ him；I had told him already.
A. shouldn’t have told B. needn’t have told
C. couldn’t have told D. mustn’t have told
B
考查情态动词。答语意为：你本没必要告诉他，我已经告诉过他了。故用needn’t have done表示 “本不必做却做了”。shouldn’t have done表示 “本不应该做但做了”；couldn’t have done “不可能做某事”；must表示猜测时只用于肯定句中，must have done “准是……”。