单选题 "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.

【正确答案】 A

【答案解析】[解析] 该题为“It's high time that...”结构，从句中的动词使用过去时表示虚拟语气，故A项正确。类似的结构还有“It's time that...”和“It's about time that...”等。