问题补充：
Why did you keep it a secret from me ? I about it .
A. should be told
B. ought to have been told
C. should have told
D. ought to be told
答案：
A. should be told
(答案→)B. ought to have been told
C. should have told
D. ought to be told
解析：表示应该做某事，但事实上没做到，应用“should / ought to +不定式的完成式”，本句为被动语态。
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