— May I come in? I'm sorry I am late. 

— Come in, please. But could you please tell me _____? [ ]

A. how do you come to school

B. what were you doing then

C. who you talked with

D. why you are late again

毛 * * 同志在党的七届二中全会上要求全党在胜利面前要保持清醒头脑，在夺取全国 * * 后要经受住执政的考验，务必使同志们继续地保持（）、不骄、不躁的作风，务必使同志们继续地保持艰苦奋斗的作风。

A、谦虚、谨慎

B、虚心、谨慎

C、公正、公平

D、团结、奋进