考研复试英语问好，可以简洁而礼貌地说：
Good morning/afternoon, sir/professors. It is my pleasure to be here for this interview.
Good morning/afternoon, sir/professors. It is my great honor to have an opportunity for this interview.
Good morning. I am very glad to be here for this interview. My name is Xu Haobo, and my English name is Jacky Lee. I've finished my undergraduate education in Xidian University.
这些问候语既体现了对考官的尊重，又能展示出你的礼貌和自信。根据不同的时间段，你可以选择“Good morning”或“Good afternoon”。如果你知道考官的名字，可以在问候后加上“sir”或“professors”来显得更加正式和尊重。