第15题: [单项选择]"You are very selfish. It's high time you ______ that you are not the most important person in the world," Edgar said to his boss angrily. A. realized B. have realized C. realize D. should realize 参考答案:A 答案解析:[解析] 该题为It's high time that…结构,从句中的谓语动词使用过去时表虚拟,故A项正确。类似的结构还有It's time that…和It's about time that…等。