I suppose he ought to have known that ?A. don’t IB. oughtn’t heC. do ID. ought he

问题补充：

I suppose he ought to have known that,?

A. don’t I

B. oughtn’t he

C. do I

D. ought he

答案：

A. don’t I

(答案→)B. oughtn’t he

C. do I

D. ought he

解析：“I suppose+宾语从句”后面的反问句与宾语从句中的主语和谓语一致。

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