Snape strode into the Potions Office and turned around to shut the door.
Alistair hurriedly reached out to block the closing door, looking up at him with a ingratiating smile as he whispered, "Professor, I didn't mean to keep it from you. I just borrowed a Time-Turner from Professor McGonagall to come back and take the end-of-year exams. Today is the fourth-year Potions exam, isn't it? I'm here to take your Potions exam."
Snape's hand remained on the stone door as he said coldly, "Taking up a professor's rest time at night to give you an exam? I'm afraid your Potions grade will be a fail. Return to where you came from, Mr. Ruler."
Chapter 158