单选题   Yesterday, Jane walked away from the discussion. Otherwise, she ______ something she would regret later.
 
【正确答案】 D
【答案解析】本句考查虚拟语气，表示与过去事实相反的情况，用主语+should/would/might/could+have done。句意为：玛丽幸亏昨天没有参与讨论，要不然她不一定会说出什么令她后悔的话。